A/C orifice tube assy.

[itsacrazyasian]

2 harbor freight pumps, and a one ebay model would barely reach 27 inHg in my experiance. The cheap ones you see on ebay and harbor freight are a waste of money.

The general concensus is that a air operated vacuum pump WILL NOT pull a hard enough vacuum to boil water out of a system.

http://aircondition.com/tech/questions/38/Air-Powered-A{47}C-Vacuum-Pumps

I never used the harbor **** ones... Like i said, the one i have is made by FJC. It works in a pinch but uses alot of air. It's there for backup, but i got a great deal on a dosivac 2 stage vacuum pump that was new in box at a pawn shop... So thats my backup now. Still waiting on snapon to fix my recovery machine AGAIN.