Fire Hydrant Threads

Do not measure a badly worn thread.

Fire hydrant threads. Most fire hydrants have two 2 5 inch hose connection outlets with 7 5 threads per inch tpi and one 4 5 inch pumper connection outlet with 4 threads per inch. The larger out lets sometimes called the steamer nozzles or connections are 4 inch or 4 5 inch nst. Qrfs carries a wide range of fire hose adapters designed to join fire hose fire hydrants and fire department connections with incompatible thread standards. Forged 316ss pipe fittings socket weld ansi b16 11 2000 3000.

Assured flow s hydra eze compound is a premium synthetic food grade non drying thread sealant and anti seize compound formulated with a balanced blend of ptfe and other lubricating solids homogenized into a non melting grease carrier. Both the odm and tpi are needed. 4 1 2 m v o. The hydrant outlets usually have male national standard threads nst to mate with fire hose couplings.

Seat ring removeable without removing lower barrel. X 4 tpi threads per inch. The permit will generally require a hydrant meter a gate valve and sometimes a back flow preventer. 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.

Fire hydrant having barrel thread dimensions of 8 250 o d. Anti seize lubricant for fire hydrant hose nozzles. The smaller outlets sometimes called the hose nozzles or connections are 2 5 inch nst. 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. If only a worn thread is available send the male fitting to national fire equipment ltd for an accurate.