Blower Relief Valve, Vacuum Capabilities Pressure, Preset Limit 42 in wc, Outside Diameter 1.5 in, Inlet Size 1 1/2 in, Inlet Type NPT, Inlet Gender Male, Compatible Manufacturer Part Number VFC300A-7W, VFC300P-5T, Compatible Grainger Part Number 5Z649, 5Z187, Overall Length 4.75 in