CDX825
filtration nut
I just did what these guys did. Used R152a in my R12 system. It works well and is safer than propane and the other hydrocarbon blends. Its also approved by the EPA as a drop in replacement for R12.
https://www.youtube.com/watch?v=dl4qOySVru0
https://www.youtube.com/watch?v=dl4qOySVru0