Hello,

Im in the middle of my kitchen renovation and need help with the DWV. The house is a 1957 with galvanized piping. This stack will serve a basement sink, basement washer, main level sink, and main level dishwasher. Can I just duplicate the current piping which is 1 1/2" then gets teed into a 2" venting to the roof with ABS?

Here is what it looks like:



Thanks in advance!

other than addressing the weakened studs under the window, that all looks fine to me.
if it is possible to rotate that tee 180 DEG and pick up the downstairs vent that way, it would be better.
keep the center of the "TY" for the kitchen at about 14" off the finish floor. if you decide to use a deep sink with a disposer it will all fit nicely..
one more thing. if the galvanized vent above that higher "TEE" is well supported and the roof flashing is still good, just leave it alone. use a shielded no hub coupling to join the iron to the new plastic.



Edited 1 times.

I would pull those water lines out of the exterior wall and bring them up through the cabinet base.