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A storz suction gasket will seal when two hose couplings or adapters are connected
The male threaded side of this adapter will only connect to a 2 1/2 inch female National Hose (NH) or National Standard Thread (NST)
Manufactured to UL-19 standards as specified in "CFR 118
and 2 1/2" hose
The male threaded side of this adapter will only connect to a 2 1/2 inch female National Pipe Tapered (NPT) or a National Pipe Straight Hose (NPSH) thread
Brass 1 1/2" Industrial Washdown Nozzle (NPSH) Female Threads_NH A storz suction gasket willCompact brass 1 1 2 inch industrial combination nozzle has the option of either a fog pattern or a straight stream. This 48 GPM nozzles is well suited for lower pressures but can be used up to 100 PSI. NPSH and NPT threads are more common in industrial applications vs the more common NH NST used in most fire applications. NPSH seals with a gasket whereas NPT seals via thread friction. How we conducted our nozzle testing. We used a Honda self priming