Knox Box FDC Lock 2 1/2" NH/NST Male Locking Cap Model:3120 (6.0 TPI x 3.250 OD) User must have sufficient water

User must have sufficient water pressure for the 90 GPM version to project maximum stream distance

Due to the forged material construction

The4" Knox Storz Lock® is operated with a Knox FDC Wrench controlled by the Fire Department

Our 3/8 inch and 5/8 inch band clamp hand tool applies band clamps to complete the connection between shank style couplings and hoses

Fire valve wheel wrench grip the rims of hand valve wheels securely and provide leverage for opening and closing

Knox Box FDC Lock 2 1/2" NH/NST Male Locking Cap Model:3120 (6.0 TPI x 3.250 OD) User must have sufficient waterThe 3110 model with 2" NH threads (7. 5 TPI x 3. 068 OD) is the most widely used configuration however, thread patterns and sizes vary by jurisdiction, so always verify the correct specifications with your local fire department before ordering. Knox 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"