Robinair 15310 VacuMaster 3 CFM Single Stage Pump
Engineered specifically for air conditioning and refrigeration service, and is built for fast, thorough evacuation. One-stage rotary vane design provides powerful, quiet, high vacuum capability and ensures moisture removal, while the high pumping capacity reduces evacuation time. The intake screen prevents foreign matter from entering the pumping chamber, and an internal exhaust filter separates oil vapor from the exhaust flow. Aluminum housing and rotary vanes keep the pump weight low, making it easy to carry. 3 CFM free air displacement. Features 110-volt single-stage design, 1/4" flare & 1/2" ACME intake ports and a  "No-Hassle" over-the-counter replacement warranty.