Fire Hydrant Threads

The larger out lets sometimes called the steamer nozzles or connections are 4 inch or 4 5 inch nst.

Fire hydrant threads.

Do not measure a badly worn thread. 4 1 2 m v o. Forged 316ss pipe fittings socket weld ansi b16 11 2000 3000. The impressions on the paper give the number of threads per inch tpi.

X 4 tpi threads per inch. 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. Qrfs carries a wide range of fire hose adapters designed to join fire hose fire hydrants and fire department connections with incompatible thread standards. The smaller outlets sometimes called the hose nozzles or connections are 2 5 inch nst.

Fire hydrant having barrel thread dimensions of 8 250 o d. Fire hydrant connections carry hose pumper hose city nom. Anti seize lubricant for fire hydrant hose nozzles. The hydrant outlets usually have male national standard threads nst to mate with fire hose couplings.

Seat ring removeable without removing lower barrel. 3 you may also use this same method to determine the outside diameter od of a hose. If only a worn thread is available send the male fitting to national fire equipment ltd for an accurate. 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. 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.