First off, yet me address one of the negative reviews about inside pump and non resistant parts.
You never put galvanized products inside pump.
Refrigerant and oil will break down the zinc, which will then increase metal content and wear down the vanes prematurely.
The inside of the pump is like engine, should be coated in oil.
you are not changing oil often enough.
I do not do much HVAC. 6CFM is adequate for evacuating in supermarket, or oil separator, etc.
6CFM applies to Stage 1, every JB pump has CFM for Stage 2.
This will just take longer to get to the second stage than 10CFM pump..
These pumps are easy to use, and easy to repair.
My gripes are JB should at least put two 3 8 ports or one 1 2 port on this pump, it should have valve.
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