Blower Relief Valve, Vacuum Capabilities Pressure, Preset Limit 127 in wc, Outside Diameter 2 in, Inlet Size 2 in, Inlet Type NPT, Inlet Gender Male, Compatible Manufacturer Part Number VFC800A-7W, VFC904A-7W, VFZ801A-5W, VFZ801A-7W, Compatible Grainger Part Number 53WC15, 53WC16, 5F243, 5Z189, Overall Length 4.75 in