Fire Hydrant Connection Sizes

Pipe size shall be a minimum of 4 in.

Fire hydrant connection sizes.

Seat ring removeable without removing lower barrel. Hydrants have 5 1 4 bonnets upper barrels safety flanges and lower barrels and are marked 5 1 4 even though the main valve opening is 4 1 2. Harrington integral hydrant storz permits firefighters to connect fire hose to your hydrant in seconds. Fire hydrant having barrel thread dimensions of 8 250 o d.

Fire hose nozzles have female inlets that connect to male ended fire hoses. For hydraulically calculated systems the pipe size shall be permitted to be less than 4 in. X 4 tpi threads per inch. Dry hydrants are pipes connected to unpressurized water sources like lakes or ponds the choice of male or female threads varies from place to place.

Dia thds inch ns national standard follows nst also nh 2 5 7 5 4 5 4 austin tx ns 4 6 charlotte nc ns 4 6 chicago il 4 5. 100 mm but not less than the largest riser. The great baltimore fire of 1904 which destroyed more than 1 500 buildings in baltimore md and the 1991 oakland hills fire where incompatible hose and fire hydrant couplings delayed a fight against an oakland ca blaze that killed 25 people. 1 1 1 this standard gives the performance and requirements for new fire hose couplings and adapters with nominal sizes from 3 4 in.

Fire hydrant connections carry hose pumper hose city nom. 150 mm for fire boat connections. Two 2 1 2 inch 65 mm side outlets and a single 4 1 2 inch 115 mm or 6 inch 150 mm pumper outlet. This is a connection on the exterior of a commercial building where a responding fire department can attach a fire hose and pump water into the building s stand pipe system supplementing the water pressure to the buidling s sprinkler system.

Mismatched threading was a major contributor to at least two historic fires. The size and number of the outlets serve as one limit to the. Connection takes just 1 4 turn to connect or disconnect. Hose angle valves often used with permanent indoor hose installations feature either male or female threaded outlets.

Fire hydrants have male threaded outlets or nozzles. They are commonly used to help firefighters be prepared and save time in emergency response and firefighting applications. 19 mm nominal diameter fitted with garden hose couplings. 4 1 2 m v o.

Harrington s is widely regarded as the most efficient available. Fire hose and hydrant adapters are fittings that securely connect fire hoses to nozzles hydrants fire trucks and other water sources. Fdc stands for fire department connection. 200 mm and the specifications for the screw thread connections on those couplings and adapters.

19 mm through 8 in. A 1 1 1 some fire fighting organizations use small hose less than 3 4 in. All size fittings available. 100 mm for fire engine connections.