| [GMCnet] Homemade vacuum pump for air conditioning work [message #218470] |
Thu, 15 August 2013 16:05  |
emerystora
Messages: 4442
Registered: January 2004
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Senior Member |
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It is very, very easy to make your own vacuum pump and very inexpensive.
Get a compressor from an old refrigerator or window air conditioner.
Hook an electrical cord to the wires. Remember that the black wire goes to the brass screw in the plug and the white wire goes to the chrome or silver screw. There is usually a green wire. That is the ground.
Run the compressor and put your finger over the tubes. The one that has suction is the one that you will use for your setup.
You can purchase a valve with the fitting for the hose from an air conditioner supply shop (or from the internet). Or you can just put on a 7/16" x 20 fitting for the R12 hose.
That's it.
Emery Stora
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