* Integral Check Valve - prevents pump oil from being sucked into the system if a power loss occurs * Molded Base - Durable polycarbonate base improves pump balance and minimizes vibration Robinair Vacuum Pumps are engineered specifically to meet your A/C maintenance needs and to give you trouble-free operation. Take advantage of our years of experience and know-how developing pumps to help you do your job faster and better. NO HASSLE WARRANTY - All Robinair Vacuum Pumps are backed by our exclusive "No Hassle" over-the-counter replacement warranty. You can return a pump to your Robinair distributor, within the first year, for an immediate exchange - with no hassle! Designed for use on A/C-R systems using CFCs, HCFCs, and HFCs in conjunction with mineral oil, ester oil, alkyl-benzene oil and PAG oil as lubricants. Do not use with ammonia or lithium bromide systems; not for use with flammable refrigerants.

Two Stage Design: Second stage starts pumping at a lower pressure to pull a deeper ultimate vacuum

Offset Rotary Vanes: Proven design creates the deep vacuum conditions for a thorough evacuation

Gas Ballast feature - helps keep the pump oil clean by reducing condensation of moisture

Iso-Valve isolates pump from the system with just 1/4 turn making it simple to measure rate of rise

Die-Cast Aluminum housing - lightweight but durable