Gimper
New Member
I'm working on the plans to finish our basement, and am thinking that it would be great to add a wetbar. There are existing stubouts for a shower, stool (under the air hockey table) and lav as can be seen in the attached pictures and drawing. I believe that the vertical line on the right in the photos is the vent for the stool and that I can stick a 2"x1.5" santee in that for a lav without issue. (Any disagreement?)
I've drawn out what I believe to be the existing lines under the slab. I dug back a couple of inches and can see the 2"x1.5" wye that goes off to the shower vent. The purple is the short bit I will add to position the trap. Ideally I would add another wye off of that to run the yellow line over to the wall against the shower for the wetbar sink drain.
We're under the 2012 IPC, and from what I can figure from the DFU calculations, if the yellow line came off downstream of the wye for the shower vent then it would be fine to share the 2" drain line with the shower. With it upstream, would it technically create a wet vent for the shower? Is that allowed?
From a practical standpoint, given that even if the vent to the sink became closed off completely, I can't imagine the flow from the 1.5" line wyed into the 2" for something like 6-8" could suck the shower trap dry. Considering that it's a bar sink that will likely rarely get used, I can't see it not working fine in perpetuity, however that doesn't mean that it will pass inspection.
Given that the wet bar vertical is only a foot away from the opening for the shower drain, I was thinking that I could simply dig under and core a hole to bring it up through; any reason I can't do that as long as I get the slope right? I could rent a concrete saw and break the short channel out with a sledge, or even use a masonry blade on an angle grinder to score it and rent a small demo hammer, but it looks like I can have the hole done for about the same cost as either of those options and it seems like it would be way easier and less dusty.
I'll probably ditch the plan if I need to split off the bar sink downstream of the shower vent, as I really just don't feel like demoing and doing concrete down for what would be a "sort of nice to have" feature, but if I can get away with it for a couple of hours of work... it seems worth it.
Please excuse the messy basement.
Any advice is appreciated! I'd be happy to provide more information/pictures if it will help.
-Kris
I've drawn out what I believe to be the existing lines under the slab. I dug back a couple of inches and can see the 2"x1.5" wye that goes off to the shower vent. The purple is the short bit I will add to position the trap. Ideally I would add another wye off of that to run the yellow line over to the wall against the shower for the wetbar sink drain.
We're under the 2012 IPC, and from what I can figure from the DFU calculations, if the yellow line came off downstream of the wye for the shower vent then it would be fine to share the 2" drain line with the shower. With it upstream, would it technically create a wet vent for the shower? Is that allowed?
From a practical standpoint, given that even if the vent to the sink became closed off completely, I can't imagine the flow from the 1.5" line wyed into the 2" for something like 6-8" could suck the shower trap dry. Considering that it's a bar sink that will likely rarely get used, I can't see it not working fine in perpetuity, however that doesn't mean that it will pass inspection.
Given that the wet bar vertical is only a foot away from the opening for the shower drain, I was thinking that I could simply dig under and core a hole to bring it up through; any reason I can't do that as long as I get the slope right? I could rent a concrete saw and break the short channel out with a sledge, or even use a masonry blade on an angle grinder to score it and rent a small demo hammer, but it looks like I can have the hole done for about the same cost as either of those options and it seems like it would be way easier and less dusty.
I'll probably ditch the plan if I need to split off the bar sink downstream of the shower vent, as I really just don't feel like demoing and doing concrete down for what would be a "sort of nice to have" feature, but if I can get away with it for a couple of hours of work... it seems worth it.
Please excuse the messy basement.
Any advice is appreciated! I'd be happy to provide more information/pictures if it will help.
-Kris