Knox Box FDC Lock 1 1/2" Male NH/NST Locking Cap Model:3190 (9.0 TPI x 1.990 OD) High pressure type "B" aluminum

High pressure type "B" aluminum 2 1/2 inch female camlock (Cam & Groove) coupler to 2 1/2 inch male NH threads

Global brass Straight gate valve 2 1/2 inch female NPT to 2 1/2 inch female NPT threading is ideal for wet and combination systems as well as fire hose rack assembly

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

and petroleum products

Knox Box FDC Lock 1 1/2" Male NH/NST Locking Cap Model:3190 (9.0 TPI x 1.990 OD) High pressure type "B" aluminumKnox 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