YaeTek 4.2CFM Pneumatic Vacuum Pump for Automotive A/C Air Conditioning System - Portable Air Operated Tool for HVAC Repair, Auto Shop & Refrigerant Recovery

Could not use, my compressor was too smallFor the price of this thing it is worth it if you just have to use it now and then. I used it for my wife's ac on her car and it worked great.Works better than I expected but it's a simple Venturi set up. Easily make your own.I sent this back, because it requires a high rate air compressor. Before I was able to line that up, I learned that auto parts stores generally have low/no-cost vacuum pump loaners. This was a better option for me.I had an issue with the rear AC on my suburban so I bought a block off kit to eliminate it. Of course that means opening up the system to atmosphere, which then means I needed to vacuum it down. I almost never do AC work so buying an expensive vacuum machine would be a waste. I figured I’d try this. Well, it works. What more can I say. It pulled a strong vacuum in no time and did what I needed it to do.Worked exactly as expected! Easy to hook up to your mainifold gauges. Just add a quick connect to the back and turn on the compressor. I used a 21gal compressor and only needed to stop the vacuum pump twice to let it recharge. Feels cheap but worked great. Only thing that I didn't like about the vacuum is how it evacs any remaining freon into the casing of the pump. Cleaned up easily. Also DON'T buy the "recommended with this item" fitting they list unless you are positive you need it. Your manifold gauges should fit the pump already and the fitting is for the evac pumps with a motor. You CAN'T return the fitting so be careful about buying it. (Since when can't we return Prime items?)For the $ Well worth it, I pulled a A=C Vacuum in about 15 min.@ 130PSI It did an Outstanding Job !! I got this 98 S10 A/C system blowing @ 39Deg. With using 134A freon & a shot 134A Ice....Burrrrr....Bought it with a it of trepidation but once I used it...it really worked and at a significantly lower price than the others. I didn't need it for AC use but needed to pull a vacuum in a gas tank to suck in some sealer to patch a leak in the tank. I hooked it up to my air compressor and it worked like champ. It pulled enough vacuum to pull in the sides of the tank! Very glad I bought this vacuum pump.With the right Air Compressor this product puts on a nice vacuum on the closed air conditioning system. No water left behind.