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I've been told three times now by people who ought to know and have done it that you can put r134 in on top of r12.

Last prices I saw on who knows how good r12 was about 15-20 bucks per pound, and mostly toward 20.


Yeah when we are doing older sealed system repairs we run 134 for as a direct replacement for 12.We have been instructed by the factory to do so for about a year now.With no troubles reported as of yet.We just top them off with the 134 since the other is getting so expensive.

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