1/4" and 1/2" Male flare intake Features a pump exhaust that doubles as an oil fill port Isolation valve for oil changes without losing vacuum in the system Built-in vacuum indicator gauge Wide-mouth oil reservoir port for easier, cleaner filling. Doubles as pump exhaust threaded to attach garden hose for exhausting to remote location Large oil sight glass for easy monitoring of oil level Large brass oil drain for easy access to fast oil changes Gas ballast valve keeps oil cleaner, longer during evacuation of wet systems Internal intake check valve prevents oil backup into the system during a power failure Intake filter screen keeps damaging particles from entering the pump Heavy duty rotors and bearings Heavy duty steel handle with lift hook for well-balanced carrying Tethered port caps stay with the pump Metal with rubber overlay base for stability Made in the USA