Blower Relief Valve Vacuum Capabilities Vacuum Preset Limit 245 in wc Outside Diameter 5 in Inlet Size 2 in Inlet Type NPT Compatible Manufacturer Part Number 2EPP8 2EPP9 2EPR1 2EPR2 2EPR5 2EPR6 2EPR7 2EPR8 2EPT2 2EPT3 2EPT8 2EPT9 2EPU5 2EPU6 2VFB60-11.5-7W Compatible Grainger Part Number 2EPP8 2EPP9 2EPR1 2EPR2 2EPR5 2EPR6 2EPR7 2EPR8 2EPT2 2EPT3 2EPT8 2EPT9 2EPU5 2EPU6 38UW80 Maximum Operating Pressure 28 in Hg Minimum Operating Pressure 1 in Hg