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. Fire hose nozzles have female inlets that connect to male ended fire hoses. 100 mm for fire engine connections. Pipe size shall be a minimum of 4 in. All size fittings available.

19 mm through 8 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. They are commonly used to help firefighters be prepared and save time in emergency response and firefighting applications. 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.

Pipe size shall be a minimum of 6 in. Seat ring removeable without removing lower barrel. A 1 1 1 some fire fighting organizations use small hose less than 3 4 in. Fire hydrant having barrel thread dimensions of 8 250 o d.

For hydraulically calculated systems the pipe size shall be permitted to be less than 4 in. Mismatched threading was a major contributor to at least two historic fires. Fdc stands for fire department connection. 19 mm nominal diameter fitted with garden hose couplings.

200 mm and the specifications for the screw thread connections on those couplings and adapters. Harrington s is widely regarded as the most efficient available. A traditional dry barrel fire hydrant contains three outlets. 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. The size and number of the outlets serve as one limit to the. 100 mm but not less than the largest riser. 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.

Hose angle valves often used with permanent indoor hose installations feature either male or female threaded outlets. 1 1 1 this standard gives the performance and requirements for new fire hose couplings and adapters with nominal sizes from 3 4 in. 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. Fire hydrants have male threaded outlets or nozzles.

Harrington integral hydrant storz permits firefighters to connect fire hose to your hydrant in seconds. 4 1 2 m v o. 150 mm for fire boat connections. Connection takes just 1 4 turn to connect or disconnect.