The Uniweld 5.5 CFM Vacuum Pump can be used for deep vacuum service on appliances, A/C, automotive and commercial systems using CFC, HCFC and HFC refrigerants in conjunction with mineral oil, ester oil, alkybenzene oil and PAG oil as lubricants. The large sight glass makes checking oil levels quick and easy. The large capacity oil reservoir has a readily accessible oil drain and the wide mouth oil port prevents unnecessary oil spills. The dual intake fitting includes 1/4” male flare and 1/2” acme with tethered caps. Oil capacity: 450 ml. Unit weighs 22 lbs.