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 Joiner DRILL BIT Y Semi-Automatic Disc Filter Ventury Assembly Bend Semi-Automatic Screen Filter Pepsi Joiner Header Assembly Pressure Relief Valve