---
title: Pre-Action and Deluge Sprinkler Systems
…44 unchanged lines
- "Double-interlock pre-action (freezer / refrigerated, closed heads)"
- "Deluge (high-hazard, open heads, total-area discharge)"
− - "Multiple systems on this project — see drawings"
default: "Single-interlock pre-action (water-sensitive, high-value, closed heads)"
```
…317 unchanged lines
- "Extra Hazard Group 2"
- "Special hazard — deluge, engineered density"
− - "Multiple hazard areas — see drawings"
default: "Ordinary Hazard Group 1"
```
…385 unchanged lines
- "Open sprinklers (deluge)"
- "Open directional spray nozzles (deluge)"
− - "Multiple types — see drawings"
default: "Closed upright sprinklers (pre-action)"
```
…2 unchanged lines
label: Sprinkler / Nozzle K-Factor
type: select
+drawing_ref: true
options:
- "K-5.6 (standard commercial)"
- "K-8.0 (large orifice)"
- "K-11.2 (extra large orifice)"
- "K-14.0"
− - "Multiple K-factors — see drawings"
default: "K-5.6 (standard commercial)"
```
…116 unchanged lines
label: Auxiliary Drain Configuration
type: radio
+drawing_ref: "pitch and drainage plan"
options:
- "Single drain valve at each trapped low point"
- "Two-valve drum drip assembly (isolation and drain valves)"
− - "Per drawings — see pitch and drainage plan"
default: "Two-valve drum drip assembly (isolation and drain valves)"
```
…336 unchanged lines
## The Owner shall maintain a service agreement with qualified fire protection and fire alarm service contractors, and records of all inspections and tests shall be retained on-site and available to the AHJ.