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 Ring End Cap Semi-Automatic Disc Filter Inline Dripper Elbow (Trigger) Takeoff 32 MM TEE DRILL BIT Pepsi Takeoff Pepsi End Cap Riser Pipe