This is designed with the Iso-Valve, which isolates pump from system, making it easy to measure rate of rise
Also it�s offset rotary vanes work in conjunction with vacuum pump oil to create a powerful compression inside the pumping chamber
Its gas ballast feature helps keep oil clean for longer time by introducing a small amount of dry atmospheric air to prevent condensation of moisture within the pumping chamber WARNING: This product can expose you to chemicals, including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.