Yeah, there are several of these substitues available.  The requirements are
simple (and LAW with hefty fines):

1) Evacuate current system with approved recovery equipment/container.
2) Change the charging valves AND placard the firewall to prevent inadvertant
introduction of the old R-12.  The valve itself serves no other function.

The charging process is somewhat different, in that it must go in to the
system as liquid.  This because these are all blends and the boiling points
are different and the proper mix *must* be maintained.

The last problem are the hoses.  The blends *require* "barrier type hose"
not the older/cheaper "nitrile" hose.  The Europeans typically used the
later ..  :-(

- Frank

 >Subject:      Re: it's time to deal with the A/C in the south - getting rid of
 >To: Frank Terhaar-Yonkers <fty@cisco.com>
 >
 >you MIGHT want to check out the web page for Pennzoil ... and follow their
 >clicks to the page about their new drop-in replacement for R-12. it's called
 >FRIG-C (i didn't make that up) and supposedly is much less expensive than
 >R-12 or R-134a and costs only about $40-50 to retrofit your system to use
 >it (some valve or something).
 >
 >just a thought. that's all i've seen or heard about it. out here in the
 >sticks, it's hard to find anybody who can even spell Freon! :(
 >
 >joel
 >

\\\\////\\\\////\\\\\////\\\\\////\\\\////\\\\////\\\\////\\\\////\\\\////\\\\
Frank Terhaar-Yonkers
Cisco Systems, Inc.
Cat3900 Software Team
7025 Kit Creek Road  PO Box 14987
Research Triangle Park,  North Carolina  27709
fty@cisco.com   voice (919)472-2101   FAX (919)472-2940