Originally Posted by cobalt327
Run the outlet end of the lines into a container that has a rag loosely over the opening to keep the vapors from billowing out.
X3 on all info here. Also this rag trick works well. PLUS when you think you have flushed the cooler clean, put a CLEAN rag over the line and blow flush through. Then check the clean rag for debris, like metal ya know. If it is clean...then you are done, if you get some metal or foreign material, keep going... check again.
Flushing an AC system is the same. I allways check for a clean rag after flushing, especially after a catostrophic compressor failure.Just sayin