Pressure Relief Valve Aluminum Cover with 1½“ BSP/NPT Female Threaded drain portWhen network pressure exceeds set point, valve opens by itself quickly and protects system by releasing over pressurePressure Relief setting : 1.5 kg/cm2 to 5.5 kg/cm2 Other Products Fertilizer Tank Semi-Automatic Disc Filter Elbow (Trigger) 32 MM JOINER Semi-Automatic Screen Filter End Cap Ring Joiner Pepsi Takeoff 32 MM MTA TEE