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Light industrial Use
Male to male adapters are used to bridge male to female hoses
The male threaded side of this adapter will only connect to a 6 inch female National Pipe Tapered (NPT) or National Pipe Straight Hose (NPSH) thread
Residential use
Knox Box FDC Lock 1 1/2" Male NH/NST Locking Cap Adhesive_Yes Light industrial UseKnox FDC Locks protect fire department connections (FDCs), keeping pipes clean of debris to ensure the delivery of high pressure water flow to fire sprinkler systems. The Knox FDC Lock is available in 1 1 2" configuration and is operated with a Knox FDC wrench controlled by the Fire Department. Ensures ready and reliable connections to fire sprinkler systems Protects check valves from freezing in cold climate areas Eliminates costly services to back