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Ziegelsteinfaust · 02-19-2019, 12:15 AM

Yes use nitrogen which is about a $20 refill if you own the bottle already. I do commercial ac, and my gauges fit old R12 fittings.

I would pressurize the system to 100 Psi, and use spray leak detector. It is most likely the hoses so I would replace the first as a way to proof check the work.

02-19-2019, 12:15 AM	#2
Ziegelsteinfaust Registered User Join Date: Dec 2012 Location: Temple City Posts: 3,560	Re: R12 and I’m Tired of Sweatin’ Yes use nitrogen which is about a $20 refill if you own the bottle already. I do commercial ac, and my gauges fit old R12 fittings. I would pressurize the system to 100 Psi, and use spray leak detector. It is most likely the hoses so I would replace the first as a way to proof check the work.