I have to move a section of wall mounted 3″ PVC soil pipe down about 7″ to make room for a basement window. There is a cleanout just after an outside corner, with the pipe coming into the odd leg of a Y, and the plug in the in-line leg. I intend to replace the Y and use the in-line (run?) branch for the pipe and put the cleanout in the odd leg. That’s where the 7″ is coming from. The other splice will be an extension into an existing 45 deg drop (from ceiling hung to about mid-wall) 30′ away. It would be much neater for cleanout access if I could add about 12″ or so to the odd leg of the Y to bring the plug closer to the corner of the new wall (in-line with the pipe downstream of the cleanout), rather than putting a large access panel in the perpendicular wall, closest to the Y. Is there any prohibition against using extensions from the Y to the cleanout plug that anyone is aware of? And while I’m at it, does anyone know what a good support interval for 2″ and 3″ sch. 40 PVC is? The existing pipe is supported at each end and mid-point, and sags quite a bit in between, to the point (in the case of the 2″) that there was actually a belly in a 10′ run from the kitchen sink (which clogged solid during the prepurchase inspection). I’ve since added support to some of them, but I was wondering if there is a generally accepted minimum spacing (not just code minimum). I’ve searched the archives, but was unable to find anything. Thanks in advance.
Be seeing you…