1 Scope
NOTE This standard covers the design documentation, equipment selection, installation, factory and field testing, and acceptance of a stationary fire pump assembly installed to provide the flow and pressure required by an automatic sprinkler system, a standpipe system, or both. (1.1)
NOTE The fire pump assembly consists of the pump itself, the driver (an electric motor or a diesel engine), the controller for the driver, a jockey (pressure maintenance) pump with its own controller, the suction and discharge piping and specialties within the fire pump room, a flow test arrangement (test header or flow meter loop), and the power supply arrangement, including any automatic transfer switch or alternate power source for an electric-driven pump. (1.2)
NOTE The fire pump is a single-purpose, life-safety machine that must start and deliver rated flow and pressure within seconds of the demand signal, sometimes after months or years of standby. (1.3)
1.4 The Contractor and the Engineer shall treat NFPA 20 and the supporting standards as the controlling design basis throughout.
1.5 The Contractor and the Engineer shall not modify the specified arrangement to save space, simplify installation, or reduce cost without express written approval of the Engineer of Record and acceptance by the Authority Having Jurisdiction.
1.6 All work shall comply with the edition of NFPA 20 adopted by the AHJ, together with NFPA 25 for inspection, testing, and maintenance, NFPA 70 (NEC) Article 695 for the power supply to electric fire pumps, the International Building Code, and the International Fire Code as adopted locally.
1.7 Where local amendments modify NFPA 20, the local amendment governs except where it is less stringent than the base standard, in which case the base standard governs.
1.8 The Contractor shall confirm the adopted edition of NFPA 20 before design begins.
NOTE Successive editions of NFPA 20 have introduced significant changes to controller requirements, signal monitoring, listed component lists, fuel storage for diesel drivers, and the design and supervision of the fire pump room itself. (1.9)
1.10 This standard does not address the underground fire service main (NFPA 24), the storage tank (NFPA 22), the downstream sprinkler or standpipe systems served by the pump, or pumps for hazardous-process or industrial fire protection applications such as foam, water spray, or water mist; projects with those applications shall add the applicable NFPA standard to the basis of design.
2 Referenced Standards
2.1 Equipment, materials, installation, and testing shall comply with the current adopted editions of the following standards.
NOTE Where standards conflict, the more stringent requirement governs unless the Engineer of Record directs otherwise in writing. (2.2)
| Standard |
Title |
| NFPA 20 |
Standard for the Installation of Stationary Pumps for Fire Protection |
| NFPA 22 |
Standard for Water Tanks for Private Fire Protection |
| NFPA 24 |
Standard for the Installation of Private Fire Service Mains and Their Appurtenances |
| NFPA 25 |
Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems |
| NFPA 37 |
Standard for the Installation and Use of Stationary Combustion Engines and Gas Turbines |
| NFPA 70 |
National Electrical Code, Article 695 (Fire Pumps) |
| NFPA 72 |
National Fire Alarm and Signaling Code |
| NFPA 110 |
Standard for Emergency and Standby Power Systems |
| IBC |
International Building Code |
| IFC |
International Fire Code |
| ASCE/SEI 7 |
Minimum Design Loads and Associated Criteria for Buildings and Other Structures (nonstructural component seismic design) |
| UL 218 |
Standard for Fire Pump Controllers (electric) |
| UL 448 |
Standard for Centrifugal Stationary Pumps for Fire Protection Service |
| UL 1247 |
Standard for Diesel Engines for Driving Centrifugal Fire Pumps |
| UL 1478 |
Standard for Fire Pump Relief Valves |
| FM 1311 |
Approval Standard for Centrifugal Fire Pumps (Horizontal and Vertical Shaft) |
| FM 1312 |
Approval Standard for Centrifugal Fire Pumps (Vertical Turbine Type) |
| FM 1321/1323 |
Approval Standard for Centrifugal Fire Pump Drivers — Electric Motor |
| FM 1333 |
Approval Standard for Fire Pump Controllers (Electric Motor Driven) |
| FM 1335 |
Approval Standard for Fire Pump Controllers (Diesel Engine Driven) |
| ASME B16.5 |
Pipe Flanges and Flanged Fittings |
| ASME B16.9 |
Factory-Made Wrought Buttwelding Fittings |
| HI 14.1-14.6 |
Rotodynamic Pumps for Nomenclature, Definitions, Application, and Operation |
| HI 14.6 |
Rotodynamic Pumps for Hydraulic Performance Acceptance Tests |
| HI 9.6.3 |
Rotodynamic Pumps — Guideline for Allowable Operating Region |
| NEMA MG 1 |
Motors and Generators |
| IEEE 519 |
Recommended Practice and Requirements for Harmonic Control in Electric Power Systems (where VFD-controlled pressure maintenance is used) |
| NETA ATS |
Acceptance Testing Specifications for Electrical Power Equipment and Systems |
3 Submittals
3.1 Action Submittals
3.1.1 The Contractor shall submit the following for the Engineer of Record's review and the AHJ's approval prior to procurement and installation.
3.1.2 No fire pump component shall be released for fabrication or delivery until the corresponding submittals are returned.
NOTE Fire pump submittals are reviewed by the AHJ as part of the fire protection plan review process in most jurisdictions, and incomplete submittals are a primary cause of project schedule slippage at this trade. (3.1.3)
3.1.4 The submittal shall be a single coordinated package including the pump, driver, controller, jockey pump and its controller, suction and discharge piping arrangement, accessories, and the test arrangement.
3.1.5 The package shall demonstrate that the listed components are compatible as an assembly — the pump listing, the motor listing, and the controller listing each call out compatibility constraints that must be reconciled.
3.1.6 Action Submittal Items
3.1.6.1 The action submittal package shall include the following items:
- Pump certified shop test curve from the manufacturer's factory test (Hydraulic Institute Acceptance Grade 1B or as required by NFPA 20), showing the actual pump's flow-versus-head, brake horsepower, and efficiency characteristics across the full operating range from churn through 150% of rated capacity
- Pump product data, including pump model, type (horizontal split-case, vertical in-line, vertical turbine, end-suction), nominal rated capacity (gpm), nominal rated total head (psi or ft), impeller diameter, suction and discharge nozzle sizes, rotation, and weight
- Driver product data: for electric motors, NEMA frame size, horsepower, voltage, full-load amps, locked-rotor amps, service factor, insulation class, enclosure type, and the FM/UL listing data; for diesel engines, the engine model, rated brake horsepower at the pump rotational speed, fuel consumption, cooling system arrangement (heat exchanger or radiator), and the UL 1247 listing data
- Controller product data: for electric controllers, the UL 218 listing data, FM 1333 approval data (where required), the starting method (full voltage, part-winding, wye-delta, autotransformer, soft-start, or variable-frequency drive — for limited applications), short-circuit current rating (SCCR), the alarm and supervisory signal points, and the transfer switch arrangement if integral; for diesel controllers, the UL 1247 or FM 1335 listing data, alarm signal points, battery charger arrangement, and weekly test programming
- Jockey (pressure maintenance) pump and controller product data, including jockey pump capacity, head, motor horsepower, controller listing, and the pressure switch arrangement
- Suction and discharge piping arrangement drawing showing pipe sizes, fittings, valves, gauges, the eccentric suction reducer (flat-on-top), pressure relief valve(s), main relief valve discharge cone (where required), waste cone, hose valve header or flow meter loop arrangement, drain and air release piping
- Pump room layout drawing showing clearances around the pump assembly, controller mounting and working clearance per NEC 110.26, ventilation provisions, drainage to a floor drain, the location of the fire department connection if interconnected, and the access route for future pump replacement
- Electrical one-line diagram and feeder sizing per NEC Article 695 for electric fire pumps, including the source(s) of supply, the disconnect arrangement, the overcurrent protective device, and the conductor sizing
- Fuel oil system drawing for diesel-driven pumps, including the day tank, fuel piping, fill arrangement, and vent termination, in accordance with NFPA 20 Chapter 11 and NFPA 37
- Seismic restraint calculations and details for the pump, driver, controller, fuel oil tank (diesel), and piping per ASCE/SEI 7 nonstructural component requirements, where the project Seismic Design Category requires them
- Battery calculations for the diesel engine starting batteries and the controller standby battery, where applicable
- Listing/approval documentation: UL 448 (pump), UL 1247 (diesel engine), UL 218 / FM 1333 (electric controller), UL or FM listing for the diesel controller, and FM 1311/1312/1321/1323 where the project requires FM approval in addition to UL listing
☑ Certified factory pump test curve
☐ Pump product data
☐ Driver product data (motor or engine)
☐ Fire pump controller product data
☐ Jockey pump and controller product data
☐ Suction and discharge piping arrangement drawing
☐ Pump room layout drawing with clearances
☐ Electrical one-line per NEC Article 695 (electric pumps)
☐ Fuel oil system drawing (diesel pumps)
☐ Seismic restraint calculations and details
☐ Battery calculations (diesel starting / controller standby)
☐ UL listing / FM approval documentation for all components
3.2 Closeout Submittals
3.2.1 At substantial completion, prior to acceptance of the fire pump installation, the Contractor shall submit the following:
- Field acceptance test report signed by the installing Contractor, the pump manufacturer's representative, and the AHJ representative, recording flow and pressure at no-flow (churn), 100% rated, and 150% rated capacity, plotted against the certified factory test curve
- Contractor's Material and Test Certificate for Fire Pumps (NFPA 20 figure) signed by the installing Contractor
- As-built drawings of the fire pump room, pump assembly, piping, and electrical or fuel oil systems, including all field changes from the reviewed shop drawings
- Operation and maintenance manual including the pump curve, controller wiring diagram, troubleshooting guide, NFPA 25 inspection and test schedule, the recommended weekly test procedure, and the annual flow test procedure
- List of recommended spare parts per NFPA 20 and the manufacturer's recommendation, with current unit pricing for re-ordering
- Warranty documentation for the pump, driver, and controller — separate warranties for each are common and shall each be provided
☑ Field acceptance test report — flow/pressure at churn, 100%, 150%
☐ Contractor's Material and Test Certificate (NFPA 20)
☐ As-built drawings — pump room, piping, electrical/fuel oil
☐ Operation and maintenance manual
☐ Recommended spare parts list with current pricing
☐ Warranty documentation — pump, driver, controller
4 Quality Assurance
4.1 Installer Qualifications
4.1.1 The fire pump shall be installed by a licensed fire protection contractor where state or local law requires that designation, working with a licensed electrical contractor for the power supply and controller installation and, for diesel-driven units, a licensed mechanical contractor for the fuel oil system and engine cooling system.
4.1.2 The installing contractor shall have completed at least three fire pump installations of comparable size and configuration within the preceding five years and shall provide project references on request.
4.1.3 The pump manufacturer's authorized representative shall be present at the field acceptance test in accordance with NFPA 20.
4.2 Listing and Approval
4.2.1 Every major component of the fire pump assembly shall be listed for fire protection service by a Nationally Recognized Testing Laboratory acceptable to the AHJ.
NOTE UL is the dominant listing agency in the US market; the listings required are UL 448 for the centrifugal pump, UL 1247 for diesel engine drivers, and UL 218 for electric fire pump controllers (including their integral transfer switch where applicable). (4.2.2)
4.2.3 FM Global approvals — FM 1311 / 1312 for the pump, FM 1321 / 1323 for electric motor drivers, FM 1333 for electric controllers, and FM 1335 for diesel controllers — shall be provided in addition where the Owner's property insurance carrier requires FM compliance.
4.2.4 Unlisted components, listed components that are not compatible with the rest of the assembly per their listing, and field modifications that void the listing are not permitted.
4.2.5 A pump assembled in the field from an unlisted bare-shaft pump and a separately purchased motor is not a listed fire pump and shall not be installed under this standard.
4.2.6 FM Approval Selection
● Not required — UL listing alone
○ Required — FM-approved components throughout
4.3 Single-Source Responsibility
4.3.1 The fire pump assembly — pump, driver, controller, jockey pump, and jockey pump controller — shall be furnished by a single supplier or under a single coordinated submittal in which one party is responsible for assembly compatibility, factory testing, field start-up, and warranty.
NOTE Single-source responsibility is the only practical way to ensure that the pump's listing, the motor's listing, and the controller's listing are mutually compatible and that field commissioning has a single accountable party. (4.3.2)
4.3.3 Single-Source Basis Selection
● Pump manufacturer furnishes pump, driver, and controller as a coordinated assembly
○ Fire protection contractor furnishes the assembly through a single packaged source
4.4 Factory Test
4.4.1 The pump manufacturer shall perform a factory acceptance test on the assembled pump before shipment.
4.4.2 The factory test shall demonstrate the pump's flow and pressure performance across the full operating range from churn through 150% of rated capacity, in accordance with the Hydraulic Institute Acceptance Test Grade required by NFPA 20 (Acceptance Grade 1B per HI 14.6 for most fire pumps).
4.4.3 The certified factory test curve shall be furnished with the action submittal.
4.4.4 Field acceptance shall confirm that the installed pump delivers performance within the listed tolerance band of the certified factory curve when corrected for site conditions.
4.5 Pre-Installation Conference
4.5.1 A pre-installation conference shall be held in the fire pump room (or its planned location) before installation begins and shall include the installing fire protection Contractor, the electrical Contractor, the controller manufacturer's representative, the pump manufacturer's representative, the AHJ where the AHJ chooses to attend, and the General Contractor.
4.5.2 The conference shall confirm room dimensions and clearances, the location and rating of the electrical service to the pump room, the routing of fuel oil supply and return piping and the location of the day tank (diesel), the ventilation arrangement, the floor drain location, and the planned date of the field acceptance test.
4.5.3 Meeting minutes shall be distributed to all attendees within five business days.
5 Environmental and Service Conditions
5.1 Pump Room Ambient Conditions
5.1.1 The fire pump room shall be maintained at an ambient temperature not less than 40°F (4°C) at all times, in accordance with NFPA 20.
5.1.2 For diesel-driven pumps, the room shall be maintained at not less than 70°F (21°C) where the engine manufacturer requires that minimum temperature for reliable cold start without external engine heaters, or alternatively shall be provided with engine block heaters that achieve and maintain the engine manufacturer's required pre-start jacket temperature.
5.1.3 Cold ambient temperatures are a leading cause of diesel pump starting failures during fire conditions, and the room temperature requirement shall not be waived.
5.1.4 Pump Room Temperature Setpoint
4080
4050607080
Default: 70 °F
5.1.5 The pump room shall be ventilated to remove heat from the running pump and driver and, for diesel pumps, to provide combustion air for the engine and to dilute crankcase blow-by and exhaust leakage.
5.1.6 Ventilation rate shall be calculated by the engine manufacturer for diesel-driven units and shall comply with NFPA 20 Chapter 11.
5.1.7 Louvers and dampers in ventilation openings shall be of fail-open construction, remaining open under loss of power so that combustion air is available even when the building electrical system is impaired.
5.1.8 Ventilation Method Selection
○ Natural ventilation through fail-open louvers (electric pumps only)
○ Mechanical ventilation with fail-open dampers (electric pumps, large rooms)
● Engine-mounted radiator with full forced-air ventilation per engine manufacturer (diesel pumps)
○ Heat exchanger with raw water cooling and minimal ventilation (diesel pumps with adequate cooling water)
5.2 Pump Room Fire Resistance
5.2.1 The fire pump room shall be enclosed with construction having a fire resistance rating not less than that required by NFPA 20 for the building type and pump arrangement, generally 2 hours for high-rise buildings and 1 hour for other buildings.
5.2.2 Where the pump room is located on the exterior of the building or in a separate pump house, the fire resistance requirement may be reduced; the Engineer of Record shall confirm with the AHJ.
5.2.3 Penetrations through the pump room boundary shall be firestopped with listed firestop systems matching the rating of the enclosure.
5.2.4 Pump Room Rating Selection
1 hour (low-rise buildings, interior pump room)
2 hours (high-rise buildings, interior pump room)
Detached pump house — rating per IBC and AHJ
Per drawings
5.3 Seismic Requirements
5.3.1 Fire pumps, drivers, controllers, fuel oil tanks, and connected piping shall be seismically restrained in accordance with ASCE/SEI 7 nonstructural component provisions and the project's Seismic Design Category.
NOTE The fire pump assembly is classified as a designated seismic system under ASCE 7 because it is required by code to function during and after an earthquake; this triggers higher seismic design forces and a requirement that the equipment be qualified by either shake-table testing or experience data. (5.3.2)
5.3.3 Fire pump assemblies provided with manufacturer-published seismic certification shall be installed using the certified mounting and connection methods.
5.3.4 Seismic Design Category Selection
A or B — minimal seismic restraint required
C — standard seismic restraint required
D — enhanced seismic restraint and component certification required
E or F — full seismic certification and inspection required
Per drawings
6 Design Basis
6.1 Rated Capacity
NOTE The pump rated capacity is the flow at the rated total head, defined at the design point on the pump curve, and is the basis against which all NFPA 20 acceptance criteria are applied. (6.1.1)
6.1.2 The fire pump shall be sized so that it can deliver not less than 150% of rated capacity at not less than 65% of rated head, and the churn pressure (no-flow shutoff head) shall not exceed 140% of rated head.
NOTE These three points — churn at 100% flow, rated at 100% flow, and 150% capacity at minimum 65% of rated head — are the NFPA 20 performance envelope that every centrifugal fire pump must satisfy. (6.1.3)
6.1.4 The required rated capacity is determined by the hydraulic demand of the served system at the design area, plus any hose stream allowance, applied at the most hydraulically remote portion of the system.
6.1.5 The Engineer of Record shall calculate the demand and confirm that the pump rated capacity equals or exceeds the demand at the design pressure required to overcome system static head and friction loss back to the available pressure at the pump suction.
6.1.6 Rated Capacity Selection
255000
250500750100012501500200025003000350040005000
Default: 1000 gpm
Per drawings
NOTE NFPA 20 lists the standard rated capacities for listed centrifugal fire pumps at 25, 50, 100, 150, 200, 250, 300, 400, 450, 500, 750, 1000, 1250, 1500, 2000, 2500, 3000, 3500, 4000, 4500, and 5000 gpm. (6.1.7)
6.1.8 The Contractor shall not specify a non-listed flow rating; the pump shall be selected at a standard capacity that meets or exceeds the calculated demand.
NOTE Selecting a pump rated higher than the demand is preferred to selecting one that is exactly equal, because the larger pump provides a safety margin and operates closer to its best efficiency point during the typical partial-flow alarm conditions. (6.1.9)
6.2 Rated Pressure (Total Head)
NOTE The pump rated total head is the increase in pressure that the pump produces at rated flow, expressed in psi (more common in US fire protection practice than the engineering convention of feet of head). (6.2.1)
NOTE The required rated head is the difference between the pressure required at the base of the riser plus all friction losses in the discharge piping back to the pump, and the available pressure at the pump suction flange under design flow conditions. (6.2.2)
6.2.3 Rated Total Head Selection
40400
5075100125150175200250300350400
Default: 125 psi
Per drawings
NOTE The combination of rated capacity and rated head determines the pump's brake horsepower requirement at the design point and at the 150% flow / 65% head point that NFPA 20 acceptance testing requires the driver to satisfy. (6.2.4)
6.2.5 The driver shall be sized to deliver the brake horsepower required at the 150% point without overload; for electric motors this drives the motor horsepower selection, and for diesel engines this drives the engine selection.
6.2.6 The driver's nameplate rating shall not be confused with the brake horsepower it actually produces — engines and motors deliver less than nameplate under non-standard conditions, and the listed assembly shall satisfy 150% flow at the actual site conditions.
6.3 Churn (Shutoff) Pressure
NOTE Churn pressure is the pressure produced by the pump at zero flow, sometimes called the shutoff head. (6.3.1)
6.3.2 Under NFPA 20, churn pressure shall not exceed 140% of rated pressure.
NOTE Excessive churn pressure indicates a pump curve that is too steep at the low-flow end and creates two problems: it may overpressure downstream piping and components rated at the system working pressure, and it tends to cause hunting of the jockey pump or repeated short-cycling of the fire pump itself in response to normal system pressure fluctuations. (6.3.3)
6.3.4 Where the churn pressure cannot be limited to 140% of rated, an automatic main relief valve shall be installed on the discharge to limit downstream pressure.
6.3.5 Maximum Churn Pressure Selection
100140
115120125130135140
Default: 140 % of rated head
6.4 Suction Supply Source
6.4.1 The pump suction supply shall be one of: a public water main of adequate capacity, a private fire service main fed from a public source, a gravity tank above the pump elevation, a pressure tank (limited applications), or a suction tank at or below the pump elevation (vertical turbine pumps only, where the pump shaft extends into the supply tank or sump).
NOTE The available suction pressure, including the worst-case pressure under design flow, determines the pump rated head and influences the selection of pump type — vertical turbine pumps are required where suction is below the pump elevation because horizontal pumps cannot reliably draw suction lift on a fire pump assembly. (6.4.2)
6.4.3 Suction Supply Source Selection
Public water main (positive pressure under flow)
Private fire service main from public source
Gravity tank (elevated storage)
Pressure tank (limited application per NFPA 20)
Suction tank at or below pump elevation (vertical turbine pump required)
Per drawings
6.4.4 Suction pressure at design flow shall be confirmed by hydrant flow test in accordance with NFPA 291.
6.4.5 Where the water supply curve under design flow conditions falls below the pump's minimum allowable suction pressure (which for most listed pumps shall not be less than 0 psig at the suction flange, and shall never be negative — that is, the pump shall not be operated under suction lift conditions other than by vertical turbine pumps designed for it), the Engineer shall provide a suction tank, a booster arrangement, or a different pump configuration.
6.4.6 Available Suction Pressure Selection
0100
10203040506080100
Default: 20 psi
Per drawings
7 Pump Configuration
7.1 Pump Type
NOTE The pump type is selected based on the suction supply arrangement, the available pump room dimensions, the rated capacity, and the rated head. (7.1.1)
NOTE Each configuration has a defined application envelope, and selecting a pump outside that envelope produces a system that will not pass field acceptance testing. (7.1.2)
7.1.3 Pump Type Selection
Horizontal split-case (in-line shaft, double-suction impeller)
Vertical in-line (compact footprint, single-suction)
End-suction (horizontal, single-suction, smaller capacities)
Vertical turbine (line-shaft, for suction below pump elevation)
Per drawings
7.1.4 Horizontal Split-Case Pumps
NOTE Horizontal split-case pumps are the dominant choice for medium-to-large fire pumps (typically 500 gpm and above) where positive suction pressure is available. (7.1.4.1)
NOTE The casing splits horizontally to permit inspection and removal of the rotating assembly without disturbing the suction or discharge piping. (7.1.4.2)
NOTE The double-suction impeller is hydraulically balanced, which reduces axial thrust and extends bearing life. (7.1.4.3)
7.1.5 Vertical In-Line Pumps
NOTE Vertical in-line pumps are compact, single-suction designs in which the motor sits directly above the pump casing on a common shaft. (7.1.5.1)
NOTE They are useful where floor space is limited and where the rated capacity is moderate (typically up to 1500 gpm at moderate head). (7.1.5.2)
NOTE They are easier to install in tight pump rooms because they require less floor area, but maintenance access to the impeller requires removing the motor. (7.1.5.3)
7.1.6 End-Suction Pumps
NOTE End-suction pumps are horizontal single-suction units commonly used at the smaller end of the fire pump range (250 gpm to 1000 gpm) and where the rated head is modest. (7.1.6.1)
NOTE They are economical and easy to maintain but are less common for medium and large capacity fire pumps because the single-suction impeller produces axial thrust that limits bearing life under the demanding fire pump duty cycle. (7.1.6.2)
7.1.7 Vertical Turbine Pumps
NOTE Vertical turbine pumps are line-shaft pumps used where the suction supply is below the pump elevation — for example, where the supply is a buried suction tank, a stream, or a tank with insufficient elevation to provide positive suction at the discharge head. (7.1.7.1)
NOTE The pump bowls and impellers are submerged in the water and connected to a discharge head and driver at the surface by a vertical line shaft. (7.1.7.2)
7.1.7.3 Vertical turbine pumps shall comply with FM 1312 in addition to UL 448.
7.1.7.4 Where a vertical turbine pump is used, the Contractor shall provide the column pipe, line shaft, discharge head, and any sump or suction barrel arrangement in accordance with NFPA 20 Chapter 7.
7.2 Number of Stages
7.2.1 Pump Stages Selection
● Single-stage (single impeller)
○ Multi-stage (multiple impellers in series — required for high head, low flow applications)
NOTE Single-stage pumps are standard for the majority of fire pump applications; multi-stage pumps are used where the required rated head exceeds what a single impeller can develop at the rated capacity, typically when rated head exceeds 250 psi. (7.2.2)
7.2.3 Multi-stage pumps are more sensitive to suction conditions and shall be provided with careful arrangement of the suction piping.
7.3 Pump Materials
7.3.1 Pump casing material shall be cast iron or ductile iron for normal fresh water fire service.
7.3.2 Where the pump suction supply contains seawater, brackish water, or other corrosive water, bronze or stainless steel internals shall be specified, in accordance with the pump manufacturer's recommendation for the water analysis.
7.3.3 Impellers shall be bronze unless the water chemistry requires stainless steel.
7.3.4 Pump Material Selection
● Cast iron (standard for fresh water service)
○ Ductile iron (heavy-duty fresh water service)
○ Bronze-fitted (corrosive or brackish water)
○ Stainless steel internals (seawater or aggressive water)
● Bronze (standard)
○ Stainless steel (corrosive water or aggressive chemistry)
8 Driver
8.1 Driver Type
8.1.1 The fire pump driver shall be either an electric motor or a diesel engine.
NOTE The driver choice is determined by the reliability of the electric power supply, the building's emergency power arrangement, and Owner preference; electric drivers are simpler to install and maintain, have no fuel storage requirement, and respond instantly to start signals, while diesel drivers are independent of the building electrical system entirely and remain available during a utility outage that takes the electric pump offline. (8.1.2)
8.1.3 Driver Type Selection
● Electric motor
○ Diesel engine
○ Combined — primary electric with diesel backup pump
Per drawings
8.1.4 NFPA 20 permits an electric driver alone only where the building has a reliable power source as defined by the standard.
8.1.5 Where the electric service does not satisfy the reliability test of NFPA 20 Section 9.3, either a diesel-driven backup pump shall be provided, the electric pump shall be supplied from two utility sources or one utility plus a listed on-site generator, or the pump shall be diesel-driven outright.
8.1.6 The Engineer of Record shall document the basis for the driver selection and the reliability evaluation in the design narrative.
8.2 Electric Motor
8.2.1 Where the driver is an electric motor, the motor shall comply with NEMA MG 1, shall be specifically listed for fire pump service per UL 448 / FM 1321/1323, and shall have the horsepower rating required to drive the pump at 150% of rated flow without overload.
8.2.2 Motors shall be of the squirrel-cage induction type, with Class F or higher insulation, and shall be sized so that the service factor is not relied upon to deliver the rated power.
NOTE Two-pole high-speed motors (3600 rpm nominal) and four-pole motors (1800 rpm nominal) are both common in fire pump service; the speed is selected by the pump manufacturer to match the pump curve. (8.2.3)
8.2.4 Electric Motor Voltage and Horsepower Selection
200V, 3-phase, 60 Hz
208V, 3-phase, 60 Hz
230V, 3-phase, 60 Hz
460V, 3-phase, 60 Hz (standard for mid-to-large pumps)
575V, 3-phase, 60 Hz
2300V, 3-phase, 60 Hz (medium voltage, large pumps)
4160V, 3-phase, 60 Hz (medium voltage, large pumps)
Per drawings
5500
57.5101520253040506075100125150200250300400500
Default: 75 HP
Per drawings
8.2.5 The motor horsepower shall be selected to the next standard NEMA rating at or above the maximum brake horsepower required at any point on the pump curve, including the 150% flow / 65% head point.
8.2.6 The motor service factor (typically 1.15) shall not be used to absorb steady-state brake horsepower at any operating point; under NFPA 20, the motor shall not overload at 150% rated flow without using the service factor.
8.2.7 Electric Motor Enclosure Selection
○ Open drip-proof (ODP) — clean indoor pump room only
● Totally enclosed fan-cooled (TEFC) — standard for fire pump service
○ Totally enclosed non-ventilated (TENV) — sealed mechanical room
8.3 Diesel Engine
8.3.1 Where the driver is a diesel engine, the engine shall be listed for fire pump service per UL 1247, shall be of the compression-ignition four-stroke type, and shall be rated for the brake horsepower required at the pump's 150% rated flow / 65% rated head point at the maximum elevation and ambient temperature of the installation.
8.3.2 Engine ratings are corrected to standard SAE J1349 conditions; field installations at high altitude or in hot pump rooms shall use the engine manufacturer's de-rated curve to confirm that the installed engine has adequate power.
8.3.3 Diesel Engine Cooling Selection
● Engine-mounted radiator with electric fan (most common, requires generous ventilation)
○ Heat exchanger with raw water cooling (requires reliable cooling water source)
○ Closed-loop cooling with skid-mounted radiator and remote air cooler
NOTE Heat exchanger cooling draws cooling water from the pump discharge through a heat exchanger and returns it to a wasteline; it is simpler than radiator cooling and requires less ventilation but consumes water from the fire protection supply during pump operation, whereas radiator cooling is self-contained and is the dominant choice for new installations where the pump room has adequate ventilation. (8.3.4)
8.3.5 Diesel Engine Brake Horsepower Selection
25700
255075100150200250300400500600700
Default: 150 BHP
Per drawings
8.3.6 The diesel engine shall have two independent starting battery sets per NFPA 20, each capable of starting the engine without the other.
8.3.7 Each battery set shall be supervised by the controller for state of charge, and the controller shall automatically switch between the two battery sets so that both are exercised.
8.3.8 Loss of either battery set shall generate a supervisory signal at the fire alarm system.
8.3.9 Battery state of charge shall be maintained by a controller-mounted battery charger that complies with UL 1247.
8.3.10 Starting Battery Configuration Selection
● Two independent lead-acid battery sets per NFPA 20 (required)
8.4 Diesel Engine Fuel Supply
8.4.1 The fuel supply for diesel-driven fire pumps shall be a day tank sized to provide a minimum running time of 1 gallon per horsepower plus 5 percent for sump and expansion, in accordance with NFPA 20.
8.4.2 The day tank shall be located in the pump room within the diked spill containment provided for the tank and shall be sized as the lesser of: the calculated NFPA 20 minimum, or the volume that complies with local building and fire code limits on fuel storage in interior rooms.
8.4.3 The tank, piping, and venting shall comply with NFPA 37 and the IFC.
8.4.4 Diesel Fuel Tank Capacity Selection
501500
507510015020025030050075010001500
Default: 200 gallons
Per drawings
8.4.5 The fuel tank shall be filled and maintained at a level not less than 67 percent of capacity throughout the life of the installation, in accordance with NFPA 25 inspection requirements.
8.4.6 Fuel level shall be monitored and a low-fuel supervisory signal shall be wired to the fire alarm system.
8.4.7 Fuel quality degrades over time; the Owner shall be advised in the operation and maintenance manual that diesel fuel in storage may require periodic polishing or replacement, and biocide additives may be required where biological growth in the tank is observed.
9 Fire Pump Controller
9.1 General
NOTE The fire pump controller is the dedicated control panel that starts the pump on demand, monitors the driver, alarms abnormal conditions, and (for electric pumps where applicable) transfers the pump load between normal and alternate power. (9.1.1)
9.1.2 The controller shall be listed for fire pump service: UL 218 for electric controllers and UL 1247 (in combination with the diesel engine) for diesel controllers, with FM 1333 or FM 1335 approvals where required.
9.1.3 The controller shall be furnished by the pump assembly supplier as part of the listed assembly and shall not be field-substituted or modified.
9.1.4 Internal components, programming, and signal wiring shall not be altered in the field except by authorized service personnel from the controller manufacturer.
9.2 Electric Controller — Starting Method
9.2.1 Starting Method Selection
Full voltage (across-the-line) — standard for most installations
Part-winding (reduced inrush, dual-voltage motors)
Wye-delta (reduced inrush, large motors)
Autotransformer (reduced voltage, large motors with supply impedance concerns)
Solid-state soft starter (UL 218 listed for fire pump service)
Variable-frequency drive (limited NFPA 20 applications — confirm AHJ acceptance)
Per drawings
9.2.2 Full voltage (across-the-line) starting is the simplest, most reliable, and most common method for fire pump motors and shall be the default unless the supply impedance, transformer size, or utility coordination requires a reduced-inrush method.
9.2.3 Reduced-voltage and soft-start methods reduce inrush current but introduce additional components that can fail in storage; their use shall be justified in the design narrative and shall be acceptable to the AHJ.
NOTE Variable-frequency drives on fire pump motors are permitted by NFPA 20 only for the limited variable-speed pressure-limiting applications introduced in recent editions; standard fire pump duty does not use a VFD. (9.2.4)
9.3 Electric Controller — Transfer Switch
9.3.1 Where an alternate power source is provided to satisfy the reliability requirements of NFPA 20 — typically an on-site emergency generator or a second utility service — the controller shall include or be paired with an automatic transfer switch listed for fire pump service.
9.3.2 The transfer switch shall transfer the pump load to the alternate source on loss of normal power within 10 seconds, in accordance with NFPA 20, and shall transfer back to the normal source on its restoration after a defined retransfer delay.
9.3.3 Alternate Power Source Selection
Single utility source — no alternate (where utility meets NFPA 20 reliability)
Two utility sources with listed automatic transfer switch
Utility plus on-site emergency generator with listed automatic transfer switch
Two on-site sources where utility is unavailable (e.g., remote site)
Per drawings
● Integral to fire pump controller (single listed assembly)
○ Separate listed transfer switch adjacent to controller
9.3.4 The transfer switch shall be specifically listed for fire pump service.
9.3.5 General-purpose automatic transfer switches shall not be used; they lack the supervised signaling and continuous-duty performance required by UL 218 for fire pump applications.
9.4 Diesel Controller
9.4.1 The diesel fire pump controller shall comply with NFPA 20 Chapter 11 and shall be UL- or FM-listed for diesel fire pump service.
9.4.2 The controller shall provide automatic engine cranking from either battery set in sequence on receipt of a start signal; manual emergency start; automatic weekly engine test cycling per NFPA 25 with run time and engine speed verification; battery charger supervision for both battery sets; engine monitoring for overspeed, low oil pressure, high coolant temperature, and run/fail; and fuel tank low-level supervision.
9.4.3 The diesel controller shall include a programmable weekly test feature that automatically starts the engine, runs it for the time required by NFPA 25 (a minimum of 30 minutes weekly for diesel pumps), and records the test in a non-volatile event log.
9.4.4 The Owner shall be advised that the weekly test is required for compliance with NFPA 25 and that a missed test is a code violation subject to AHJ enforcement.
9.5 Controller Signal Points to Fire Alarm
9.5.1 The controller shall provide supervised dry-contact outputs to the building fire alarm system for, at minimum, the following points per NFPA 72 and NFPA 20:
- Pump running
- Loss of phase or phase reversal (electric)
- Controller power on (normal source)
- Controller on alternate power source (where transferred)
- Engine running (diesel)
- Engine fail to start (diesel)
- Battery trouble (diesel — either set)
- Low fuel level (diesel)
- Controller in "off" or "manual" position (any controller — supervisory signal indicating the controller is not in the automatic ready state)
- Low pump room temperature (where below 40°F)
- Reservoir / suction tank low water level (where applicable)
☑ Pump running
☐ Loss of phase / phase reversal (electric)
☐ Controller on alternate power source
☐ Engine running (diesel)
☐ Engine fail to start (diesel)
☐ Battery trouble — either set (diesel)
☐ Low fuel level (diesel)
☐ Controller off / manual (any controller)
☐ Low pump room temperature
☐ Suction supply low (where applicable)
9.6 Controller Mounting and Working Clearance
9.6.1 The controller shall be wall-mounted or floor-mounted (as required by the rating and size) within the fire pump room, located adjacent to the pump and within view of the operator standing at the pump.
9.6.2 NEC 110.26 working clearance shall be maintained at the controller; reduced clearances are not acceptable for fire pump controllers under any circumstances.
9.6.3 The controller shall not be located in a way that requires opening another disconnect or panel to reach it.
9.6.4 Controller Mounting Selection
○ Wall-mounted (smaller controllers, up to mid-size pumps)
● Floor-mounted free-standing (larger pumps, integral transfer switch)
Per drawings
10 Jockey (Pressure Maintenance) Pump
10.1 Purpose
NOTE The jockey pump is a small, separate pump dedicated to maintaining system pressure against small leakage so that the main fire pump does not cycle in response to a minor pressure drop. (10.1.1)
10.1.2 Every fire pump installation shall include a jockey pump and a separate jockey pump controller.
10.1.3 The jockey pump start and stop pressure shall be set so that the jockey pump replenishes minor pressure losses on its own without ever causing the main fire pump to start.
10.2 Capacity and Pressure
10.2.1 The jockey pump shall be sized to deliver no more than the makeup flow required to recover system pressure after a small leak — generally not exceeding 1 percent of the main fire pump's rated capacity, with a minimum of 1 gpm.
NOTE Sizing the jockey pump too large results in a jockey that masks significant leaks; sizing it too small leaves the main fire pump to handle leaks that should not require its operation. (10.2.2)
10.2.3 Jockey Pump Capacity Selection
150
1351015202550
Default: 10 gpm
10.2.4 The jockey pump rated head shall exceed the main fire pump churn pressure by 10 psi or more, so that the jockey can maintain system pressure above the main pump's stop point and prevent main pump short-cycling.
NOTE A common error is to specify a jockey pump with rated head equal to or less than the main pump churn pressure; this results in the jockey unable to recover after a flow event and the main fire pump cycling repeatedly to make up small leakage. (10.2.5)
10.2.6 Jockey Pump Head Selection
50400
75100125150175200250300400
Default: 150 psi
10.3 Jockey Controller
10.3.1 The jockey pump controller shall be separate from the main fire pump controller.
10.3.2 The jockey controller shall include pressure-switch start and stop points, a minimum-run timer (typically not less than 60 seconds) to prevent rapid cycling, and a manual stop/start switch.
10.3.3 The jockey controller shall not be UL 218 listed (which applies to fire pump controllers); a standard listed motor controller suitable for the duty is acceptable.
10.3.4 Jockey Controller Type Selection
● Listed motor controller with pressure switch and minimum-run timer (standard)
○ Variable-frequency drive jockey (where reduced cycling and water-hammer mitigation are required)
10.3.5 Where a VFD-driven jockey pump is specified, the drive shall not be installed on the main fire pump and shall comply with IEEE 519 harmonic limits at the point of common coupling so that drive harmonics do not corrupt the building's normal power quality.
NOTE VFD-driven jockeys reduce on/off cycling and provide quieter operation in occupied buildings. (10.3.6)
10.4 Jockey Pressure Settings
10.4.1 Pressure switch start and stop points for the jockey and for the main fire pump shall be coordinated so that the jockey responds first to any pressure drop, recovers system pressure to its setpoint, and stops before the main pump start setpoint is reached.
10.4.2 The main pump start setpoint shall be set below the jockey stop setpoint by a margin sufficient that normal leakage and minor flow events never reach the main pump start setpoint.
NOTE Typical settings are jockey stop at 10 psi above the static system pressure required at the riser, jockey start at 15 psi below that, and main pump start at 10 psi below jockey start. (10.4.3)
10.4.4 Jockey and Main Pump Setpoint Selection
50250
75100125150175200
Default: 125 psi
Per drawings
11 Suction and Discharge Piping
11.1 Suction Piping
11.1.1 Suction piping shall be sized for a velocity not exceeding 15 ft/s at 150% of rated flow per NFPA 20, and shall be no less than the size of the pump suction flange.
11.1.2 Suction piping shall include an OS&Y indicating control valve listed for fire protection service; an eccentric reducer (where the suction pipe is larger than the pump suction flange) installed flat-on-top to prevent air pockets at the suction inlet; a suction pressure gauge; and a strainer where the supply could carry sediment.
11.1.3 Suction Pipe Size Selection
3 in.
4 in.
6 in.
8 in.
10 in.
12 in.
14 in.
16 in.
Per drawings
NOTE The flat-on-top eccentric reducer prevents a recurring field problem: a concentric reducer, or an eccentric reducer with the flat surface on the bottom, traps air at the high side of the reducer, and that air pocket migrates into the pump suction during start-up and causes cavitation, noise, and reduced flow. (11.1.4)
11.1.5 The Contractor shall confirm at installation that the flat side of the eccentric reducer is on top.
11.1.6 Suction Eccentric Reducer Orientation Selection
● Flat side on top (correct — prevents air pocket)
○ Flat side on bottom (incorrect — air pocket at high side)
○ Not applicable — no reducer (suction pipe matches pump flange)
11.1.7 A check valve shall not be installed in the suction piping, as check valves in suction piping interfere with pump starting and are explicitly prohibited by NFPA 20.
11.2 Discharge Piping
11.2.1 Discharge piping shall be sized for a velocity not exceeding 20 ft/s at 150% of rated flow per NFPA 20, and shall be no less than the size of the pump discharge flange.
11.2.2 Discharge piping shall include a check valve immediately downstream of the pump (to prevent reverse flow into a stopped pump); an OS&Y indicating control valve downstream of the check valve; a discharge pressure gauge; provisions for the main relief valve if required by the churn pressure; and the connection to the served sprinkler or standpipe system.
11.2.3 Discharge Pipe Size Selection
2-1/2 in.
3 in.
4 in.
6 in.
8 in.
10 in.
12 in.
Per drawings
NOTE The arrangement of the suction control valve, suction reducer, pump, check valve, discharge control valve, and gauges is collectively known as the fire pump trim. (11.2.4)
11.2.5 The trim shall be assembled in accordance with NFPA 20 Figure A.4.13.2.1 (or the current edition equivalent) and shall not be rearranged to suit field conditions.
11.3 Main Relief Valve
11.3.1 A main relief valve shall be installed on the pump discharge where the pump can exceed the rated pressure of the served system at any operating point, including churn.
11.3.2 The main relief valve shall be listed for fire pump service per UL 1478, shall be sized for not less than the pump rated capacity (so it can relieve full pump flow without exceeding the system pressure limit), and shall discharge to a waste cone that drains to a floor drain or other safe disposal point.
11.3.3 The relief valve shall not discharge to the suction piping under normal NFPA 20 arrangements except for specific allowable arrangements with the AHJ's acceptance.
11.3.4 Main Relief Valve Selection
○ Yes — churn pressure exceeds downstream system rating
● Yes — installed as a precaution regardless
○ No — churn pressure within downstream system rating throughout
100400
125150175200225250300350400
Default: 175 psi
Per drawings
11.4 Test Header and Flow Meter
11.4.1 A test arrangement shall be provided so that the pump can be flow-tested annually in accordance with NFPA 25 without discharging water to the served sprinkler or standpipe system.
11.4.3 Flow Test Arrangement Selection
○ Hose valve header — discharges to exterior or designated waste location
● Flow meter loop — recirculates flow back to suction supply
○ Both — flow meter for routine testing, hose header for annual full-flow verification
Per drawings
NOTE A hose valve header provides the most authoritative flow test because the discharge is to atmosphere, while a flow meter loop recirculates the water and conserves it but must be accurate to within NFPA 25 tolerance and calibrated periodically. (11.4.4)
11.4.5 The hose valve header shall have a number of 2-1/2 in. hose valves equal to or exceeding the pump rated capacity divided by 250 (so that each valve handles approximately 250 gpm at the test conditions), in accordance with NFPA 20.
11.4.6 The hose valves shall be of the listed angle-globe type used in standpipe systems, with caps and chains.
11.4.7 Where the discharge is to the exterior, the location shall not be subject to ice formation, hazard to passing traffic, or damage to landscaping or pavement.
2 valves (up to 500 gpm rated)
4 valves (up to 1000 gpm rated)
6 valves (up to 1500 gpm rated)
8 valves (up to 2000 gpm rated)
10 valves (up to 2500 gpm rated)
Per drawings
12 Power Supply for Electric Fire Pumps
12.1 NEC Article 695
12.1.1 The power supply to an electric fire pump shall comply with NEC Article 695 in its entirety.
12.1.2 Under Article 695 the conductors shall be sized at 125 percent of the motor full-load current as the minimum, but the overcurrent protection shall be sized to permit motor locked-rotor current to flow indefinitely without tripping, which is the opposite of normal motor branch circuit design.
NOTE The fire pump feeder is intentionally not protected against locked-rotor overload by the upstream breaker — the fire pump controller's listed overload protection (or thermal element) is the only protection. (12.1.3)
12.1.4 The Engineer of Record shall confirm that this arrangement is reflected in the electrical drawings and that the upstream breaker is correctly sized.
12.1.5 Feeder Sizing Selection
● 125% of motor full-load current per NEC 695.6 (minimum)
○ Larger — to limit voltage drop per project requirements
● Sized to carry locked-rotor current indefinitely per NEC 695.4 (required)
12.2 Disconnect
12.2.1 A disconnect ahead of the fire pump controller is permitted under specific NEC 695.4(B) conditions and shall be supervised in the closed position by a key lock or tamper switch.
12.2.2 The disconnect shall be marked "FIRE PUMP DISCONNECT — DO NOT OPEN UNLESS POWER SUPPLY IS DEAD."
12.2.3 Unsupervised disconnects ahead of fire pump controllers are explicitly prohibited because an open disconnect renders the fire pump unavailable without any visible indication at the controller.
12.2.4 Disconnect Arrangement Selection
● No disconnect — controller is the first device on the feeder (preferred where permitted)
○ Yes — supervised disconnect per NEC 695.4(B) with tamper switch to fire alarm
12.3 Generator Sizing
12.3.1 Where an on-site emergency generator serves the fire pump alternate power source, the generator shall be sized to start and run the fire pump motor at its locked-rotor inrush in addition to all other connected emergency loads.
NOTE Fire pump motor starting is one of the most demanding loads on an emergency generator, and a generator sized only for steady-state running load will brown out, drop frequency, and stall during fire pump start. (12.3.2)
12.3.3 Generator selection shall be coordinated with the electrical engineer and shall comply with NFPA 110.
12.3.4 The generator-pump combination shall be field tested by transferring the pump to the generator during pump start and verifying that the generator maintains voltage and frequency within tolerance.
13 Installation
13.1 Pump Foundation
13.1.1 The pump shall be installed on a concrete inertia base or a steel skid grouted to a concrete pad.
13.1.2 The foundation shall be level within tolerances specified by the pump manufacturer and shall be of sufficient mass and dimension to absorb pump vibration and resist hydraulic thrust forces.
13.1.3 Grouting shall be non-shrink grout placed in accordance with the grout manufacturer's instructions, and the grout shall fully encapsulate the base of the skid without voids.
13.1.4 Pump Foundation Selection
○ Concrete inertia base, grouted to concrete pad
● Steel skid on concrete pad, grouted
○ Per pump manufacturer's recommended foundation
13.2 Pump Alignment
13.2.1 The pump shaft and the driver shaft shall be aligned within the manufacturer's tolerance after the unit is installed and the piping is connected.
NOTE Pipe strain is the most common cause of fire pump alignment problems. (13.2.2)
13.2.3 The suction and discharge piping shall be supported by independent hangers immediately adjacent to the pump flanges so that the piping does not impose any load on the pump nozzles.
13.2.4 After the piping is connected and supported, the alignment shall be re-checked and corrected before start-up.
13.2.5 Alignment shall be verified by laser alignment or dial-indicator methods to the manufacturer's tolerances.
13.2.6 Hot alignment checks shall be performed during commissioning.
13.3 Suction Piping Routing
13.3.1 The suction piping shall enter the pump from the appropriate direction for the pump type and shall not include any abrupt turns, tees, or significant fittings within a minimum of 10 pipe diameters of the suction flange (per NFPA 20).
NOTE The suction piping is sensitive to flow disturbances; a tee or elbow too close to the suction inlet creates non-uniform velocity distribution at the impeller eye, which causes vibration, cavitation, and capacity loss. (13.3.2)
13.3.3 Where the suction pipe must turn within the 10-diameter zone, suction-conditioning straightening vanes shall be considered or the routing shall be modified.
13.4 Connections to Existing Systems
13.4.1 Where the fire pump is added to an existing fire protection system, the Contractor shall confirm that the existing piping is sized for the new pump capacity, that existing components can withstand the new system pressure, and that the existing controller signal points are compatible with the new fire alarm system.
NOTE Tying a high-pressure fire pump into a piping system rated for a lower pressure is a serious safety hazard; field-modified existing piping that fails under the new pressure can cause severe injury and property damage. (13.4.2)
13.4.3 The Engineer of Record shall confirm the existing system rating and shall require pressure-rating upgrades where required.
14 Testing
14.1 Hydrostatic Test
14.1.1 The pump's suction and discharge piping shall be hydrostatically tested at not less than 200 psi or 50 psi above the maximum system working pressure, whichever is greater, for 2 hours with no observed pressure drop, in accordance with NFPA 20.
14.1.2 The pump itself is factory-tested and is not part of the field hydrostatic test; the pump shall be isolated by closing the suction and discharge control valves during the field hydrostatic test, and the test shall be applied to the piping only.
14.1.3 Hydrostatic Test Pressure Selection
200450
200225250275300350400450
Default: 200 psi
14.2 Field Acceptance Test
14.2.1 The fire pump shall be field-tested in accordance with NFPA 20 Section 14.2 by the installing Contractor, witnessed by the pump manufacturer's representative and the AHJ.
14.2.2 The test shall demonstrate that the installed pump meets or exceeds the certified factory test curve when corrected to site conditions and shall include the following:
- Churn (no-flow) test: pump shall start, run for not less than 30 minutes, and produce churn pressure within the listing tolerance band of the certified factory curve
- 100% rated capacity test: pump shall deliver rated flow at not less than rated total head
- 150% rated capacity test: pump shall deliver 150% of rated flow at not less than 65% of rated total head
- Starting time: electric pumps shall reach rated speed within 10 seconds of start signal; diesel pumps within 20 seconds
- Transfer switch test (where present): pump shall transfer from normal to alternate power and back without interruption of pump operation
- Phase reversal and phase failure simulation (electric)
- All controller alarm signals shall be verified at the building fire alarm panel
14.2.3 Flow during the field test shall be measured by a calibrated flow meter or by hose stream measurement (using calibrated pitot-tube on the test header discharge), and pressure shall be measured by calibrated gauges that have been calibrated within the preceding 12 months.
14.2.4 The Contractor shall provide a certificate of calibration for each instrument used in the field acceptance test.
14.2.5 Flow Measurement Method Selection
○ Calibrated flow meter on test loop (where flow meter is provided)
● Pitot tube measurement at hose header discharge (calibrated within 12 months)
○ Both — pitot at header verifies flow meter reading
14.3 Periodic Testing — NFPA 25
14.3.1 The Owner shall be advised in the operation and maintenance manual that NFPA 25 requires the following:
- Weekly inspection of the pump room temperature, gauges, valves, and controller status
- Weekly engine run test of diesel pumps (30 minutes minimum)
- Monthly run test of electric pumps with no-flow operation (10 minutes minimum, or per AHJ requirement)
- Annual flow test verifying churn, 100%, and 150% capacity per NFPA 20
- Annual transfer switch test (where applicable)
- Triennial recalibration of test instruments
14.3.2 The Contractor shall provide a clear schedule of these requirements in the closeout package, including a tag at the controller showing the testing schedule.
NOTE Failure to perform NFPA 25 inspection and testing is a code violation and exposes the Owner to insurance non-compliance. (14.3.3)
15 Delivery, Storage, and Handling
15.1 Delivery
15.1.1 The fire pump assembly shall be delivered to the site only when the pump room is ready to receive it — meaning the floor pad is poured and cured, the electrical service is in place or imminent, the room is enclosed and protected from weather and theft, and the building structure can carry the pump weight.
NOTE Fire pump components are heavy, expensive, and not easily replaced; staged delivery to inadequately prepared rooms results in damaged equipment and warranty disputes. (15.1.2)
15.2 Storage
15.2.1 During storage prior to installation, the pump shall be protected from moisture, dirt, and physical damage.
15.2.2 The pump shaft shall be rotated by hand at least monthly during storage to prevent bearing brinelling from vibration.
15.2.3 The controller shall be stored in a dry, conditioned environment; controllers stored in unconditioned spaces during construction may have moisture ingress that damages internal electronics before they ever see service.
16 Warranty
16.1 Warranty Requirements
16.1.1 The Contractor shall provide a warranty covering all fire pump components — pump, driver, controller, jockey pump, and jockey controller — for a period of not less than 1 year from the date of substantial completion.
16.1.2 The warranty shall be jointly executed by the installing Contractor and the manufacturer where the manufacturer's standard warranty differs from the project warranty.
16.1.3 Pump impellers, seals, and bearings are wear items; the warranty shall clearly state which components are covered for the full warranty period and which are subject to a wear-and-tear exclusion.
16.1.4 Warranty Duration Selection
1 year from substantial completion (standard)
2 years from substantial completion
Manufacturer's standard warranty (verify period and conditions)
17 Spare Parts
17.1 Spare Parts Delivery
17.1.1 The Contractor shall provide the following recommended spare parts at substantial completion, packaged in labeled containers and delivered to the Owner:
- One complete set of pump mechanical seals or packing rings
- One impeller wear ring set
- One set of suction and discharge gaskets
- For diesel pumps: one set of fuel filters, one set of oil filters, one set of air filters, and one set of starter motor brushes
- For electric pumps: one set of motor brushes (where applicable), and one spare control transformer if the controller uses one
- One complete set of pressure gauges of the type installed
☑ Pump mechanical seals or packing
☐ Impeller wear ring set
☐ Suction and discharge gaskets
☐ Diesel filters (fuel, oil, air)
☐ Diesel starter brushes
☐ Motor brushes (electric, where applicable)
☐ Spare pressure gauges
17.1.2 The Owner shall be advised that fire pumps are demanding service equipment despite their low duty cycle, and that the spare parts inventory shall be replenished as items are consumed during NFPA 25 testing and maintenance over the life of the installation.