Water supply
Compiled text through Sep 15, 2021
Register checked through Jul 29, 2026
No later Register activity identified in this check.
Dates and status
- Compiling agency
- Executive Department
- Text status
- Westlaw Inline Boundary Correction
- Compiled text through
- Sep 15, 2021
- Register checked through
- July 29, 2026/Vol. XLVIII, Issue 30 (2026-07-29)
- Activity status
- No later Register activity identified in this check.
- Source snapshot
- Jun 6, 2026
(a)New sprinkler systems shall have at least one automatic water supply of adequate pressure, capacity and reliability meeting all of the requirements for light-hazard conditions of the generally accepted standards listed in the appendix to these rules and regulations*.
(b)When primary supply is obtained from water mains and the water pressure is insufficient to maintain 12 pounds per square inch at the highest sprinkler head, but is sufficient to maintain at least five pounds per square inch at such head, an automatic booster pump shall be used as an auxiliary means of furnishing the required supply. The booster pump shall be caused to operate when the flow of water through any portion of the sprinkler piping is equal to or greater than that flowing from a single sprinkler head. The booster pump shall be capable of supplying sufficient water for a period of at least 20 minutes to at least 25 per cent of the total number of sprinkler heads at a pressure of at least 12 pounds per square inch at the highest sprinkler head. Such booster pump shall be so connected as not to restrict the flow of water in the system.
(c)Gravity tanks, when used as the primary means of water supply for new sprinkler systems, shall have a capacity of at least 5,000 gallons and the bottom of the tank shall be not less than 20 feet above the highest sprinkler head supplied from the tank.
(d)Where approved by the department, one common source of water supply of adequate capacity may be acceptable for adjacent buildings or contiguous buildings separated by fire walls.