Fire Hydrant Ball Valve Inlet Size_2 1/2 Inch NH or NST: National hose

NH or NST: National hose or national standard thread is often referred to as fire hose thread as this is by far the most common thread in use today by fire departments

Proof Test Pressure (A pressure equal to a least two times the service test pressure)

hose coupling or an adapter check the female coupling for stamped numbers and letters

Size and length of hose

not intended for flow throttling

Fire Hydrant Ball Valve Inlet Size_2 1/2 Inch NH or NST: National hoseFire hydrant ball valve 2 1 2 inch NH NST swivel inlet x 2 1 2 inch NH NST outlet. Standard color is silver black. The most common fire hydrant outlet in the USA is 2 1 2 inches with NH NST threads.