Fire Hydrant Connection Sizes

The flange at the base of the hydrant is the point of connection for the hydrant to the rest of the barrel.

Fire hydrant connection sizes.

19 mm through 8 in. Mismatched threading was a major contributor to at least two historic fires. Fire hydrant having barrel thread dimensions of 8 250 o d. X 4 tpi threads per inch.

Fdc stands for fire department connection. Pipe size shall be a minimum of 4 in. 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.

100 mm but not less than the largest riser. Harrington integral hydrant storz permits firefighters to connect fire hose to your hydrant in seconds. 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. Fire hydrant connections carry hose pumper hose city nom.

Fire hose and hydrant adapters are fittings that securely connect fire hoses to nozzles hydrants fire trucks and other water sources. For hydraulically calculated systems the pipe size shall be permitted to be less than 4 in. 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 hose nozzles have female inlets that connect to male ended fire hoses.

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. Hose angle valves often used with permanent indoor hose installations feature either male or female threaded outlets. Connection takes just 1 4 turn to connect or disconnect. A 1 1 1 some fire fighting organizations use small hose less than 3 4 in.

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. A traditional dry barrel fire hydrant contains three outlets. 150 mm for fire boat connections. 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.

Harrington s is widely regarded as the most efficient available. All size fittings available. 19 mm nominal diameter fitted with garden hose couplings. 100 mm for fire engine connections.

Seat ring removeable without removing lower barrel. 200 mm and the specifications for the screw thread connections on those couplings and adapters. 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. 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.