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I am a DIY working on a bathroom remodel which includes converting a single sink vanity into a double. I have done enough plumbing in the past to feel reasonably confident, and have read extensively here; I want to make sure I understand what is needed.
Here is the current plumbing:
Also a close-up -- anybody see a problem with what the original builder did here?!? (How exactly do you drive a drywall screw through a stud plate and not know it??)
The new vanity will position the right-hand sink just about where the current stack is. The left hand sink will be about 16" to the left of where the original sink was -- i.e., it will need to move left one stud bay.
After a good bit of thought, here is what I am planning, assuming that I get a green light from the knowledgeable folks on this forum:
Cut the current 2" ABS stack above and below the current tee junction. Change over to PVC using flexible couplings (unless you think I should join with the green cement -- ??) -- changing to PVC because it is easier for me to source, and cheaper even counting in the cost of the couplings. Put a double fixture tee (2" x 2" x 1.5" x 1.5") in where the current sanitary tee is. On the right, the double fixture tee will immediately join with a 1.5" elbow to bring the right-hand sink drain out of the wall. On the left will be about a 32" run of 1.5" drain, then an elbow to bring the left-hand sink drain out of the wall.
Questions:
1) Am I right in thinking the horizontal runs need to drain a minimum of 1/4" per foot?
2) Is it a problem to go right from the double tee to the elbow out of the wall?
3) Is it a problem that the left and right sides of this will be so different in length?
4) All I can find at the local hardware stores (both big box and small town) are double sanitary tees, but my understanding is that that is not optimal, even if it were to pass code. So I have found double fixture tees on-line, - or at least, I think I have. It seems that these are called a hundred different things. I want to be sure that either or both of these are in fact the right fixture:
(several sizes on this page; I would get the 2 x 2 x 1.5 x 1.5)
or
Many thanks for your help!
Here is the current plumbing:
Also a close-up -- anybody see a problem with what the original builder did here?!? (How exactly do you drive a drywall screw through a stud plate and not know it??)
The new vanity will position the right-hand sink just about where the current stack is. The left hand sink will be about 16" to the left of where the original sink was -- i.e., it will need to move left one stud bay.
After a good bit of thought, here is what I am planning, assuming that I get a green light from the knowledgeable folks on this forum:
Cut the current 2" ABS stack above and below the current tee junction. Change over to PVC using flexible couplings (unless you think I should join with the green cement -- ??) -- changing to PVC because it is easier for me to source, and cheaper even counting in the cost of the couplings. Put a double fixture tee (2" x 2" x 1.5" x 1.5") in where the current sanitary tee is. On the right, the double fixture tee will immediately join with a 1.5" elbow to bring the right-hand sink drain out of the wall. On the left will be about a 32" run of 1.5" drain, then an elbow to bring the left-hand sink drain out of the wall.
Questions:
1) Am I right in thinking the horizontal runs need to drain a minimum of 1/4" per foot?
2) Is it a problem to go right from the double tee to the elbow out of the wall?
3) Is it a problem that the left and right sides of this will be so different in length?
4) All I can find at the local hardware stores (both big box and small town) are double sanitary tees, but my understanding is that that is not optimal, even if it were to pass code. So I have found double fixture tees on-line, - or at least, I think I have. It seems that these are called a hundred different things. I want to be sure that either or both of these are in fact the right fixture:
(several sizes on this page; I would get the 2 x 2 x 1.5 x 1.5)
or
Many thanks for your help!
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