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91C2wrencher:
The Duracool rep states that Duracool R12a mixes perfectly with R12. Perhaps they don't want 134 mixed with R12a, or vice versa.
I was also told that the R12a molecules are 5X larger than the R12 molecules so a system that leaked R12 through non-barrier type hoses may not leak anymore.
I sure do hope this works of me...
Mike
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