B-62-B-5 FIRE HYDRANT SPECIFICATIONS
SAMPLE SPECIFICATION FOR MUNICIPAL FIRE HYDRANTS
AWWA C502 and UL / FM 200 PSIG
A: HYDRANT CONSTRUCTION
- Fire Hydrants shall meet or exceed ANSI/AWWA C502, latest revision for use in water supply systems.
- Rated working pressure shall be 200 psig, test pressure shall be 400 psig.
- Hydrants shall be dry-barrel construction closing with and opening against the inlet pressure.
- Hydrant main valve closure shall be of the compression type.
- Traffic break feature to be designed for easy 360° rotation of nozzle section and incorporate the use of a 2-piece square rod and single cast-iron rod coupling secured with stainless steel coupling pins.
- The hydrant shall have a travel stop nut in the top of the hydrant to limit the travel of the hydrant rod.
- Hydrant designs that allow the valve bottom to stop against the shoe or employ a stop in the drain mechanism resulting in a bending moment in the rod assembly are not allowed.
- Hydrant upper and lower barrels and base shall be made of ductile iron.
- Hydrant to be Certified to NSF/ANSI/CAN Standard 61 and NSF/ANSI/CAN 372.
- Hydrant shall be UL Listed and FM Approved, in allowable configurations.
- Hydrant to be supplied with a 2-D bar code, or similar, capable of allowing a seamless enrollment of the manufacturing attributes and hydrant location into a cloud-based GIS application.
B: DRAINAGE SYSTEM
- The hydrant valve opening shall not be less than 5-1/4” and be designed so that removal of all working parts can be accomplished without excavating.
- The hydrant shall incorporate a draining system constructed entirely of bronze and positively activated by the compression of an e-coated stainless steel spring.
- Hydrant drains shall close completely after no more than 3 turns of the operating nut.
- There shall be a minimum of three internal drain ports in the hydrant seat and four outlets in the hydrant drain ring directing water to the exterior of the hydrant.
- Hydrants employing sliding-style drains are not permitted.
C: HYDRANT BARRELS AND NOZZLES
- Hydrant barrels shall be constructed of ductile iron and shall have (1) pumper nozzle and (2) hose nozzles.
- The operating nut, all nozzle cap nut dimensions and the nozzle threads shall be in compliance with the standards established by the local authorities.
- All pumper and hose nozzles shall be retained by a single-piece threaded ductile iron retaining collar. Threaded-in nozzles and nozzles using set screws or wedge pins are not allowed.
D: HYDRANT COATINGS
- Hydrant upper barrel shall be factory coated with an electrodeposition (E-coat) epoxy primer and a catalyzed two-part polyurethane top coat. Base shall be coated with fusion-bonded-epoxy.
- All bolting below grade shall be Type 304 stainless steel.
E: FRICTION LOSS
- Friction loss shall not exceed 3.5 psig at 1000 GPM through the hydrant 4-1/2 in. pumper nozzle.
Hydrants shall be the 5-¼” American-Darling B-62-B-5, by AMERICAN Flow Control.