Fire Hydrant Threads

Fire hydrant connections carry hose pumper hose city nom.

Fire hydrant threads.

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. Both the odm and tpi are needed. The permit will generally require a hydrant meter a gate valve and sometimes a back flow preventer. 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.

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. Fire hydrant having barrel thread dimensions of 8 250 o d. If only a worn thread is available send the male fitting to national fire equipment ltd for an accurate. X 4 tpi threads per inch.

The smaller outlets sometimes called the hose nozzles or connections are 2 5 inch nst. 3 you may also use this same method to determine the outside diameter od of a hose. The impressions on the paper give the number of threads per inch tpi. Do not measure a badly worn thread.

The larger out lets sometimes called the steamer nozzles or connections are 4 inch or 4 5 inch nst. The hydrant outlets usually have male national standard threads nst to mate with fire hose couplings. 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. 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.

Forged 316ss pipe fittings socket weld ansi b16 11 2000 3000. Anti seize lubricant for fire hydrant hose nozzles.