Blower Relief Valve Vacuum Capabilities Pressure Preset Limit 471 in wc Outside Diameter 5 in Inlet Size 2 in Inlet Type NPT Compatible Manufacturer Part Number 2EPP8 2EPP9 2EPR5 2EPR6 2EPT2 2EPT3 2EPT8 2EPT9 2EPU5 2EPU6 Compatible Grainger Part Number 2EPP8 2EPP9 2EPR5 2EPR6 2EPT2 2EPT3 2EPT8 2EPT9 2EPU5 2EPU6 Maximum Operating Pressure 15 psi Minimum Operating Pressure 1 psi Overall Length 6.31 in