I found on some cast ridgid copression in the 1 1/4-2" range the ring inside is too big. If I use large adjustable wrinches and get it as tight as possable the pipes are not tight, will spin, and may pull apart. If I take it apart and clip just a hair off both ends of the sealing ring it works great. When I put the pipes back together BY HAND ONLY I can't even twist them let alone pull them apart. Of coarse I crank it down still. A quality issue I guess. I don't know what it does when the rain comes but keeping the pipes together is priority 1.
Tom
