On Wed, 13 Jul 2005, Joe wrote:

> Actually, Daniel is correct on this one. Conversions from R-12 directly to
> anything other than 134A are technically illegal,

That's not correct.

1) Conversions from R12 "directly" to ANYTHING (including R134a) are
illegal. _EACH AND EVERY_ approved refrigerant has its own fittings (which
must be *permanently* installed on a retrofitted system; removable
adaptors don't cut it), usage conditions such as barrier hoses for most of
them, and labelling requirements. There is NOTHING aside from R12 that can
legally be introduced into an unmodified R12 system.

2) There are lots of legally approved automotive refrigerants.