---
title: Landscape Irrigation
…175 unchanged lines
- "On-site well"
- "Surface water (pond, lake, harvested stormwater)"
− - "Per drawings"
default: "Potable municipal supply through dedicated irrigation meter"
```
…43 unchanged lines
- "Double check valve assembly (ASSE 1015) — where permitted for the hazard level"
- "Pressure vacuum breaker assembly (ASSE 1020) — backsiphonage only, no chemical injection"
− - "Per local cross-connection control program and drawings"
default: "Reduced-pressure-principle assembly (ASSE 1013) — typical for irrigation high-hazard"
```
…16 unchanged lines
label: System Pressure Regulation at Point of Connection
type: radio
+drawing_ref: true
options:
- "Not required — supply pressure within component operating range"
- "Master pressure-reducing valve at point of connection"
- "Pressure regulation at each zone valve"
- "Pressure-regulating spray bodies / rotors only (no master regulator)"
− - "Per drawings"
default: "Not required — supply pressure within component operating range"
```
…16 unchanged lines
- "PVC Class 200 / SDR-PR (ASTM D2241), gasketed (3 in. and larger)"
- "Polyethylene (ASTM D2239 or D3035), insert or fusion fittings"
− - "Per drawings"
default: "PVC Class 200 / SDR-PR (ASTM D2241), solvent-welded"
```
…7 unchanged lines
- "PVC Schedule 40 (ASTM D1785), solvent-welded"
- "Polyethylene (ASTM D2239 or D3035), insert fittings"
− - "Per drawings"
default: "PVC Class 200 / SDR-PR (ASTM D2241), solvent-welded"
```
…15 unchanged lines
type: select
unit: psi
+drawing_ref: true
options:
- "Class 200 (SDR 21) — typical for laterals"
- "Class 315 (SDR 13.5) — high-pressure or small-diameter laterals"
- "Schedule 40 — where indicated for laterals subject to handling stress"
− - "Per drawings"
default: "Class 200 (SDR 21) — typical for laterals"
```
…8 unchanged lines
label: PVC Joining Method
type: radio
+drawing_ref: true
options:
- "Solvent weld with primer and cement (ASTM D2855 two-step)"
- "Gasketed bell-and-spigot (ASTM D3139, F477 gaskets) — mainline 3 in. and larger"
- "Threaded (Schedule 80 fittings only, ASTM D2464) — at valves and transitions"
− - "Per drawings"
default: "Solvent weld with primer and cement (ASTM D2855 two-step)"
```
…26 unchanged lines
label: Polyethylene Pipe Joining
type: radio
+drawing_ref: true
options:
- "Barbed insert fittings with stainless steel clamps (two clamps per fitting)"
- "Thermal fusion (larger-diameter mainline)"
− - "Per drawings"
default: "Barbed insert fittings with stainless steel clamps (two clamps per fitting)"
```
…26 unchanged lines
label: Zone Valve Flow Control
type: radio
+drawing_ref: true
options:
- "Flow-control stem at each valve (recommended for balancing)"
- "No flow control (fixed) — where zones are pressure-regulated elsewhere"
− - "Per drawings"
default: "Flow-control stem at each valve (recommended for balancing)"
```
…30 unchanged lines
- "Standard duty — turf and planting bed areas (pedestrian only)"
- "Heavy duty / traffic-rated — driveways, parking, and vehicular areas"
− - "Per drawings"
default: "Standard duty — turf and planting bed areas (pedestrian only)"
```
…23 unchanged lines
- "12 in. — shrub and tall groundcover beds"
- "Shrub adapter on riser — shrub beds"
− - "Per drawings"
default: "4 in. — turf areas"
```
…2 unchanged lines
label: Pressure-Regulating Spray Bodies
type: radio
+drawing_ref: true
options:
- "Pressure-regulating spray bodies (WaterSense-labeled, integral regulator)"
- "Standard spray bodies (pressure regulated at zone valve or point of connection)"
− - "Per drawings"
default: "Pressure-regulating spray bodies (WaterSense-labeled, integral regulator)"
```
…14 unchanged lines
label: Rotor Nozzle Matching Strategy
type: radio
+drawing_ref: true
options:
- "Matched-precipitation nozzle set sized by arc (quarter, half, full)"
- "Separate zones by arc (quarter heads, half heads, full heads on distinct zones)"
− - "Per drawings"
default: "Matched-precipitation nozzle set sized by arc (quarter, half, full)"
```
…22 unchanged lines
label: Head Spacing Basis
type: radio
+drawing_ref: true
options:
- "Head-to-head (100 percent of radius) spacing per design layout"
- "Reduced spacing in high-wind areas (per design, less than full radius)"
− - "Per drawings"
default: "Head-to-head (100 percent of radius) spacing per design layout"
```
…28 unchanged lines
label: Drip Zone Filtration
type: select
+drawing_ref: true
options:
- "150 mesh (approximately 100 micron) — typical for emitter tubing"
- "200 mesh (approximately 75 micron) — fine emitters or marginal water quality"
- "Disc or screen filter sized to zone — per drip product requirement"
− - "Per drawings"
default: "150 mesh (approximately 100 micron) — typical for emitter tubing"
```
…26 unchanged lines
- "0.9 GPH per emitter — typical for loam"
- "1.0 GPH per emitter — sandy soils and higher demand"
− - "Per drawings"
default: "0.9 GPH per emitter — typical for loam"
```
…8 unchanged lines
- "18 in. emitter spacing — wider plant spacing / sandy soil"
- "9 in. emitter spacing — tight spacing / clay soil"
− - "Per drawings"
default: "12 in. emitter spacing — typical for beds"
```
…34 unchanged lines
- "4 in. — turf and shallow-rooted groundcover"
- "6 in. — shrub beds"
− - "Per drawings"
default: "6 in. — shrub beds"
```
…12 unchanged lines
label: Controller Type
type: select
+drawing_ref: true
options:
- "Weather/ET-based smart controller (WaterSense, ANSI/ASABE S627)"
- "Soil-moisture-based smart controller (WaterSense)"
- "Central-control / cloud-managed controller (multi-site)"
− - "Per drawings"
default: "Weather/ET-based smart controller (WaterSense, ANSI/ASABE S627)"
```
…26 unchanged lines
label: Controller Mounting
type: radio
+drawing_ref: true
options:
- "Exterior wall / pedestal in NEMA-rated outdoor enclosure"
- "Interior wall mount (mechanical/electrical room or similar)"
− - "Per drawings"
default: "Exterior wall / pedestal in NEMA-rated outdoor enclosure"
```
…12 unchanged lines
label: Master Valve
type: radio
+drawing_ref: true
options:
- "Normally-closed master valve (recommended — mainline pressurized only on demand)"
- "Normally-open / no master valve (mainline continuously pressurized)"
− - "Per drawings"
default: "Normally-closed master valve (recommended — mainline pressurized only on demand)"
```
…9 unchanged lines
label: Flow Sensor and High-Flow Shutdown
type: radio
+drawing_ref: true
options:
- "Flow sensor with controller high-flow shutdown (recommended)"
- "Flow sensor for monitoring only (no automatic shutdown)"
- "No flow sensor"
− - "Per drawings"
default: "Flow sensor with controller high-flow shutdown (recommended)"
```
…29 unchanged lines
label: Spare Control Conductors
type: select
+drawing_ref: true
options:
- "One spare conductor to every valve box"
- "Two spare conductors to every valve box (larger systems)"
− - "Per drawings"
default: "One spare conductor to every valve box"
```
…22 unchanged lines
label: Sleeve Material and Sizing
type: radio
+drawing_ref: true
options:
- "Schedule 40 PVC sleeve, minimum twice the pipe/bundle diameter"
- "Schedule 80 PVC sleeve under heavy vehicular paving"
− - "Per drawings"
default: "Schedule 40 PVC sleeve, minimum twice the pipe/bundle diameter"
```
…27 unchanged lines
- "Drip dripline (surface-buried under mulch): 2 to 4 in."
- "Deeper cover in agricultural / deep-tillage or freeze-prone areas per drawings"
− - "Per drawings"
default: "Laterals: 12 in. minimum"
```
…16 unchanged lines
label: Mainline Hydrostatic Test
type: radio
+drawing_ref: true
options:
- "Hydrostatic test at 1.5x working pressure, held per spec (typical)"
- "Hydrostatic test at fixed pressure per local purveyor requirement"
− - "Per drawings"
default: "Hydrostatic test at 1.5x working pressure, held per spec (typical)"
```
…24 unchanged lines
label: Coverage Verification Method
type: select
+drawing_ref: true
options:
- "Visual operational test of every zone (typical)"
- "Visual test plus catch-can distribution uniformity audit on turf zones"
− - "Per drawings / water-efficiency program requirement"
default: "Visual operational test of every zone (typical)"
```
…58 unchanged lines
- "Combination drain plus blow-out"
- "Not required — non-freezing climate"
− - "Per drawings"
default: "Not required — non-freezing climate"
```
…53 unchanged lines
### The inventory shall include a representative quantity of each type of nozzle installed, spare drip emitters and fittings, the special tools required to service the heads and valves installed (including the quick-coupler key and the controller key), and spare waterproof wire-splice connectors.