Knox Box FDC Lock 3" Male NH/NST Locking Cap Model:3158 (6.0 TPI x 3.623 OD) 5" marine hose is coupled

5" marine hose is coupled with brass NPSH threads

a unique concept in rapid access for emergency response was born

Should also be used when flushing hydrants or other water systems to protect the inner liner of the discharge hose from water pressure or debris damage

Type "D" brass 1 inch female camlock (Cam & Groove) coupler to 1 inch female NPT threads

Knox Box FDC Lock 3" Male NH/NST Locking Cap Model:3158 (6.0 TPI x 3.623 OD) 5" marine hose is coupledKnox 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