Blower Relief Valve, Vacuum Capabilities Pressure, Preset Limit 68 in wc, Outside Diameter 1.5 in, Inlet Size 1 1/2 in, Inlet Type NPT, Inlet Gender Male, Compatible Manufacturer Part Number VFC500A-7W, VFC508P-2T, VFZ501A-5W, VFZ501A-7W, Compatible Grainger Part Number 4Z753, 53WC09, 53WC10, 5Z650, Overall Length 4.75 in. This item has been restricted from sale in the following state (s): []