"For the pipe seal I use 2 Viton #115 O-rings. ~~ A bag of 100 rings cost about $20 from an O-ring supplier, so I change them every time I have occasion to remove a pipe. "

Try going to Roger Zatkoff in Farmington Hills They have all kinds of O-rings in stock... Last I knew $5.00 min cash purchase could be made at the pickup counter. I ended up with a lifetime supply of O-rings For my K&B needle valves.

Bob Eckel UFO & Flying Pilgrims