So I have a smaller house that has a bathroom and a kitchen that have a common shared wall and the lav and kitchen sink are literally back to back and due to size constraints, there is absolutely no way to move them away to make the drain and supply lines a little more manageable.
As you can see in the image below, I used 2" pipe for drain. Moreover, I used the method to separate the draining and venting between the 2 sinks. I am not sure what this method is called, but I suppose the picture clearly illustrates the challenge.
My problem is the spacing of the supply lines. 4" to the right and left of both puts the hot on the bathroom side (which is the side you are looking at in the pic) and the cold on the kitchen side directly in front of the vent pipe beside it. We are going to be using a pedestal in the bathroom, so the supply will be visible, causing even more issues. The 2" DWV uses a bunch of space here as well. I do have the possibility of coming in from the side instead of where you see the PEX coming in now. I can make the bath lav work, but only by essentially extending the supply from center line distance to 6" both sides. This will still all be under the pedestal bowl, just not as tight as is standard (to the center). I assume, while not necessarily standard, that there is no problem with this.
However, if I do this, I will essentially be left having to put both hot and cold supply lines on the same side of the drain as each other (so instead of the drain being in the center, it would be to the left or right of both supplies). Aesthetically, I am not worried about it too much as it will always be in the under sink cabinet and will probably have things store in front of it. Is there anything in IPC/IBC code that disallows me doing it this way? If so, I have no clue how I will be able to do it otherwise.
A few other items. Due to tight space constraints, I may have to tee off the hot and cold supplies under the floor in between the joist and then travel up for the fixture stub outs. I plan on feeding with PEX, but then using copper for the fixture stub outs. I am not sure how close to the drywall a copper pipe can be run, but with the 2" DWV, I have basically just barely enough room for the copper to run in front of it.
Also, pay no attention to the way the supply lines are run now. Is only temporary until I am ready to re-pipe here in a few days. Also, that fully cut-and-scabbed stud is not my doing! When I opened the wall up, I found that this is actually how the original builders must have done it way back in 1943. I have since fixed it by taking this stud out and putting in a new one but that was before I took this picture. Thanks everyone!
As you can see in the image below, I used 2" pipe for drain. Moreover, I used the method to separate the draining and venting between the 2 sinks. I am not sure what this method is called, but I suppose the picture clearly illustrates the challenge.
My problem is the spacing of the supply lines. 4" to the right and left of both puts the hot on the bathroom side (which is the side you are looking at in the pic) and the cold on the kitchen side directly in front of the vent pipe beside it. We are going to be using a pedestal in the bathroom, so the supply will be visible, causing even more issues. The 2" DWV uses a bunch of space here as well. I do have the possibility of coming in from the side instead of where you see the PEX coming in now. I can make the bath lav work, but only by essentially extending the supply from center line distance to 6" both sides. This will still all be under the pedestal bowl, just not as tight as is standard (to the center). I assume, while not necessarily standard, that there is no problem with this.
However, if I do this, I will essentially be left having to put both hot and cold supply lines on the same side of the drain as each other (so instead of the drain being in the center, it would be to the left or right of both supplies). Aesthetically, I am not worried about it too much as it will always be in the under sink cabinet and will probably have things store in front of it. Is there anything in IPC/IBC code that disallows me doing it this way? If so, I have no clue how I will be able to do it otherwise.
A few other items. Due to tight space constraints, I may have to tee off the hot and cold supplies under the floor in between the joist and then travel up for the fixture stub outs. I plan on feeding with PEX, but then using copper for the fixture stub outs. I am not sure how close to the drywall a copper pipe can be run, but with the 2" DWV, I have basically just barely enough room for the copper to run in front of it.
Also, pay no attention to the way the supply lines are run now. Is only temporary until I am ready to re-pipe here in a few days. Also, that fully cut-and-scabbed stud is not my doing! When I opened the wall up, I found that this is actually how the original builders must have done it way back in 1943. I have since fixed it by taking this stud out and putting in a new one but that was before I took this picture. Thanks everyone!
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