Fire Hydrant Connection Sizes

4 1 2 m v o.

Fire hydrant connection sizes. Harrington integral hydrant storz permits firefighters to connect fire hose to your hydrant in seconds. Seat ring removeable without removing lower barrel. Fire hydrants have male threaded outlets or nozzles. For hydraulically calculated systems the pipe size shall be permitted to be less than 4 in.

Harrington s is widely regarded as the most efficient available. 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. A traditional dry barrel fire hydrant contains three outlets.

Pipe size shall be a minimum of 6 in. 19 mm nominal diameter fitted with garden hose couplings. 200 mm and the specifications for the screw thread connections on those couplings and adapters. A 1 1 1 some fire fighting organizations use small hose less than 3 4 in.

The size and number of the outlets serve as one limit to the. All size fittings available. 100 mm for fire engine connections. Mismatched threading was a major contributor to at least two historic fires.

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. 100 mm but not less than the largest riser. Connection takes just 1 4 turn to connect or disconnect. Fdc stands for fire department connection.

150 mm for fire boat connections. Fire hose nozzles have female inlets that connect to male ended fire hoses. 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.

1 1 1 this standard gives the performance and requirements for new fire hose couplings and adapters with nominal sizes from 3 4 in. Hose angle valves often used with permanent indoor hose installations feature either male or female threaded outlets. The flange at the base of the hydrant is the point of connection for the hydrant to the rest of the barrel. 19 mm through 8 in.

Fire hydrant having barrel thread dimensions of 8 250 o d. Fire hose and hydrant adapters are fittings that securely connect fire hoses to nozzles hydrants fire trucks and other water sources. X 4 tpi threads per inch. 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.