[Gmcnet] Duracool compatibility

[Gary Worobec]

I'm sure this question has been asked a dozen times but I was not paying 
attention.

Can you add Duracool to a system that already has R-12 in it to get the 
pressure up or should you evacuate all the r-12 and use straight duracool?. 
(I just need a little) I understand that with Duracool you DO NOT have to 
pull a vacuum?

Thanks,

Gary and Joanne Worobec
Anza, CA
1973 23' Glacier