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Type "DP" brass 4 inch male camlock (Cam & Groove) dust plug
NH threads are used by most fire departments and fire trucks
Forestry Type II Spec Sheet
includes 3/32” thick butyl pressure-activated self-adhesive pad
Knox Box FDC Lock 3" Male NH/NST Locking Cap Model:3158 (6.0 TPI x 3.623 OD) Type "DP" brass 4 inchKnox 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 2 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
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