We are remodeling our upstairs bathroom, and found that it is ABS from the waste stack downstairs to the toliet, shower, sink, and where it vents out the roof. We are relocating everything and adding a bathtub, so we need to replace the three way and run new pipe to all the fixtures. No one in town has ABS, and they all indicated that ABS would not meet code. Do we need to replace everything from the cast iron up with PVC? The reason that I have my doubts about ABS not meeting code is that when we remodeled the downstairs in 2007, we had a very picky inspector who definitely saw all the pipes upstairs and didn't say anything then. This is a guy who made us put in 6 support beams and pull a permit to run my own phone and cable. How can I find out if replacing existing ABS with new ABS is OK?
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