Blower Relief Valve Vacuum Capabilities Pressure Preset Limit 139 in wc Outside Diameter 5 in Inlet Size 2 in Inlet Type NPT Compatible Manufacturer Part Number VFC508P-2T VFD2S VFD41S VFZ501A-5W VFZ501A-7W VFZ701A-5W Compatible Grainger Part Number 53WC09 53WC10 53WC14 5Z650 6JD19 6JD24 Maximum Operating Pressure 15 psi Minimum Operating Pressure 1 psi Overall Length 6.31 in