Fire Hydrant Threads

The impressions on the paper give the number of threads per inch tpi.

Fire hydrant threads.

Our stock of 1 1 2 and 2 1 2 brass adapters features nst npsh and npt threaded fittings in configurations including male x male female x male and female x female. Seat ring removeable without removing lower barrel. Anti seize lubricant for fire hydrant hose nozzles. Do not measure a badly worn thread.

Fire hydrant having barrel thread dimensions of 8 250 o d. The larger out lets sometimes called the steamer nozzles or connections are 4 inch or 4 5 inch nst. The smaller outlets sometimes called the hose nozzles or connections are 2 5 inch nst. If only a worn thread is available send the male fitting to national fire equipment ltd for an accurate.

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. 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. X 4 tpi threads per inch. The permit will generally require a hydrant meter a gate valve and sometimes a back flow preventer.

Forged 316ss pipe fittings socket weld ansi b16 11 2000 3000. 3 you may also use this same method to determine the outside diameter od of a hose. 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 hydrant outlets usually have male national standard threads nst to mate with fire hose couplings. Qrfs carries a wide range of fire hose adapters designed to join fire hose fire hydrants and fire department connections with incompatible thread standards.