StephanMurray
New Member
Hello,
I am plumbing a new home on my farm in Texas. The 2 x 6 outside wall, against which my kitchen sink will be located, sits atop a quad 2x12 beam, so there is no way for me to bring a 2" sink drain from the wall directly down into the conditioned crawlspace. Instead, my plan - if you guys approve - is to bring the drain from the crawlspace through the floor of the sink cabinet. At about 16" above floor height, I would use a sanitary tee with tailpiece adaptor to tie into the sink drain. Above the sanitary tee (in approximately the location where the AAV is shown in the diagram below), the 2" vent pipe would 90 degree back into the wall, and then continue through the wall to vent through the roof. Is this allowed - i.e., can I use two 90 degree fittings in order to enter the wall with the vent, since both drain and vent cannot penetrate through the base plate?
My configuration would be very similar to the diagram below, with the dishwasher as shown. There is a window above the sink that I will need to run under with the vent before turning upwards to the roof. The drain would be shifted more to the right than that shown in the picture to avoid the awkward 45 deg shown in the diagram.
Would my plan to use 90 deg fittings to bring the vent into the wall be acceptable? How far in front of the wall should my drain be located? What are my options if I cannot bring the vent into the wall due to a code restriction? Would the AAV shown in the diagram then be acceptable, and would this be preferred to a not-per-code wall vent? I am in an area with no code restrictions - rural! - but nonetheless, want to do things the right way.
I am plumbing a new home on my farm in Texas. The 2 x 6 outside wall, against which my kitchen sink will be located, sits atop a quad 2x12 beam, so there is no way for me to bring a 2" sink drain from the wall directly down into the conditioned crawlspace. Instead, my plan - if you guys approve - is to bring the drain from the crawlspace through the floor of the sink cabinet. At about 16" above floor height, I would use a sanitary tee with tailpiece adaptor to tie into the sink drain. Above the sanitary tee (in approximately the location where the AAV is shown in the diagram below), the 2" vent pipe would 90 degree back into the wall, and then continue through the wall to vent through the roof. Is this allowed - i.e., can I use two 90 degree fittings in order to enter the wall with the vent, since both drain and vent cannot penetrate through the base plate?
My configuration would be very similar to the diagram below, with the dishwasher as shown. There is a window above the sink that I will need to run under with the vent before turning upwards to the roof. The drain would be shifted more to the right than that shown in the picture to avoid the awkward 45 deg shown in the diagram.
Would my plan to use 90 deg fittings to bring the vent into the wall be acceptable? How far in front of the wall should my drain be located? What are my options if I cannot bring the vent into the wall due to a code restriction? Would the AAV shown in the diagram then be acceptable, and would this be preferred to a not-per-code wall vent? I am in an area with no code restrictions - rural! - but nonetheless, want to do things the right way.