are you sure that the right hand side (brick wall) is exerting an influence on the pipes to such an extent that it forces the pipes to go over to an opposite wall? I can't see what else might be on the far left wall. Doesn't make sense to me.Originally Posted by Zach
is the vent going up in that middle wall a true vent, with only air in it? Your mentioning wet venting is what makes me want to double check this. The WC flange being close enough to the lav drain Wye, to be "wet" vented, is OK, if that is the only thing you were saying.