96 Converting an Air Compressor into a Vacuum Pump

This item is in the category Business & Industrial\HVAC\HVAC Parts\HVAC Fans & Blowers. Roots rotary lobe air blower vacuum pump 17cfm 1inch output mod. hdl-6.9/86 4 bolt mounting plate on bottom measures 4.75 inch x 3.25 inch rectangle plate with a 2 3/8 x 3 15/16 center to center bolt pattern.