ABS vs PVC DWV plumbing
I have been RVing for going on 20 years. Also, I have been involved with residential contracting for quite some time as well. Many years ago, ABS replaced copper as the preferred material for plumbin...
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We had an ABS elbow crack on a sink drain running several feet down then 7 feet across the RV to the grey water tank. I think it was just too long and too rigid. I replaced with a rubber elbow and have not had any more trouble.
