I posted this question just before the list went down.

My R-12 gauges do not fit the high side service valve
located behind the closet on my stock non converted
system. After checking with Bentley I found.

Bentley 87.15 A/C adaptor valve VAG 1637, installing:

"Beginning in May 1988 the threaded connection on the
AC high pressure service valve was changed from
7/16"-20 UNF to 3/8"-24 UNF. Use special adaptor VAG
1637 when making a connection to the high pressure
service valve."

Can someone tell me where I can locate one of these
adaptor valves?  A quick google for VAG 1637 and/or
the conversion sizes came up with nothing.

There has to be someone servicing there own AC on a 88
or newer Vanagon.

Thanks,
Todd
90 Syncro Westy

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