quote:Originally posted by David_Nunn:
This is one of those units:
http://www.amazon.com/UView-55...hecker/dp/B0002SRH5G
That looks like the one I linked from Sears (but somehow the link is now no good). Fantastic reviews on Amazon.
Seems like you could DIY a setup for a lot less. Hooking a vacuum source to the outlet of the swirl tank and then sucking the "replacement" fluid in from there or another "port" would seam to work as well.
But, how do you get the appropriate vacuum? A Mitivac (or similar) vacuum pump will pull about a 25 in vacuum level (about 83%). That may be enough, I don't know. Harbor Freight has some options that will do better:
http://www.harborfreight.com/a...onnectors-96677.html
uses compressed air (90 psi) to get a vacuum level of 28.3" of Mercury (about 95% of normal atmospheric pressure) for $18 or, if you want to service your A/C to the best, you can get this: http://www.harborfreight.com/2...cuum-pump-98076.html for &100 (which is what I have) that will pull a 75 micron (about 99.99%) vacuum. This will "boil" water at room temp and evaporate any water out of your A/C system. Not sure if it will boil an anti-freeze solution but that probably isn't important, only .01 of the volume of air in your system should remain after refilling the evacuated space. As Aristotle is said to have said, "Nature abhors a vacuum."
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