Id like to use a refrigerant compressor from an old air conditioner. How do I make the connection from the compressor to the first part of the vacuum press?
It can be difficult to find fittings to make that first connection. I’ve found two decent solutions that work on most of these pumps. First I want to remind anyone using a refrigerant compressor to please have the refrigerant professionally withdrawn from the system before you remove it from the equipment. The freon inside is horrendously harmful to our atmosphere. It’s not worth the weight that will sit on your shoulders when you see how much refrigerant will come out of even the smallest system. If the copper tubing on the refrigerant compressor is reasonably close to 1/4″ outside diameter, you can make an easy connection to the first component of the vacuum press (either the reservoir or the Mac valve) by simply sliding a piece of 1/4″ inside diameter vinyl vacuum tube over it. On the other end of the tube you can attached a brass barbed fitting to get to 1/4″ NPT threads. If the vacuum tubing doesn’t quite fit, you can heat it in hot water to make it more flexible and it will slide
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