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 32 MM MTA Takeoff Inline Dripper Pump Connecting Nipple Foot Batten Assembly Semi-Automatic Screen Filter Fertilizer Tank Ring Joiner Semi-Automatic Disc Filter Pepsi Takeoff