Hi everyone, this has been a great place for help. We noticed a leak in our ceiling last night, and what we found is a "OLD" 90 degree copper elbow is leaking. Right at the joint. It is pretty tight up there, with the floor joices al around it, so I wouldn't want to solder. Is there any kind of plastic or (pex) elbows I could simply attach after I cut the old 90 off? Thanks everyone...