Dswens23
New Member
I am renovating a full bath, upstairs in my house. The toilet and sinks are being relocated. It will not be inspected, but I'd prefer to do it code if possible. At a minimum, I want to do it the right way, for a well functioning, long lasting system. I'd be grateful for any help or advice I can get. The project has gotten really complicated, for something simple. Every time I think I am close to having a drain route solution figured out, I keep running into a rule or problem that prevents it from working as clean as I'd like.
The main stack comes up the outside wall of the house, hits the second floor, and turns 90, to horizontal, running inside a typical joist bay. The sink and shower all join in the horizontal line downstream from the closet flange (see attached pic of existing).
I need to move the toilet and closet flange down the same horizontal line, inside the same joist bay, almost right up to where the drain turns 90 degrees down the wall. This does not leave room for the wet vents from the shower and sinks to join the horizontal drain line in a typical wye, downstream from the toilet (as it currently is).
The toilet has to go exactly where the closet flange is shown in the pictures, give or take a few inches. There just isn't room to get a wye downstream from it.
I know one obvious solution would be to open up the wall below, and install a wye in the vertical section of the drain, to tie the sink and shower into. That said, opening up the wall down below will be very invasive and exspensive. It involves removing multi-step crown-molding, wainscotting ect, and I'd REALLY REALLY like to avoid doing that if there is any way possible.
I came up with 3 potential solutions. I drew overhead and side/3d views of each to try and illustrate what I am proposing. I'd like to know if any are viable, or if anyone has any better recommendations for a solution:
1) Install a 3" 90 with 2" side inlet, where the horizontal drain turns down. That inlet would allow me to tie in the joint shower and sink drain line, which also has another existing dry vent from the toilet also tied in ( is this still needed). The sinks and shower will all have their own dry vent already. Do you see any problems with this?
2) install a 3" 90 with 2" side inlet under the closet flange, and tie the shower, sinks, and dry vent into that side inlet. The shower and sinks are dry vented upstream. This doesn't feel like the best solution in terms water flowing downhill (seems like it could jam up at that 90 intersection) but I have seen many plumbers online recommending a version of this to others for a wet vent, as preferable to solution #1 above. I am unclear as to why, but would like to get an understanding if this is better.
3) Where the toilet goes, Install a combo wye closet flange, or wye with 45, and 45 degree closet flange. Then, I could tie in the 2" drain line upstream in the wye. That 2" line would be the intersection of a dry vent (is this still needed), and the wet vent of the shower and 2 sinks (which are all still dry vented).
Apologies, this has been a tough deal to illustrate, and is making my brain hurt. Thank you again for any time and consideration.
The main stack comes up the outside wall of the house, hits the second floor, and turns 90, to horizontal, running inside a typical joist bay. The sink and shower all join in the horizontal line downstream from the closet flange (see attached pic of existing).
I need to move the toilet and closet flange down the same horizontal line, inside the same joist bay, almost right up to where the drain turns 90 degrees down the wall. This does not leave room for the wet vents from the shower and sinks to join the horizontal drain line in a typical wye, downstream from the toilet (as it currently is).
The toilet has to go exactly where the closet flange is shown in the pictures, give or take a few inches. There just isn't room to get a wye downstream from it.
I know one obvious solution would be to open up the wall below, and install a wye in the vertical section of the drain, to tie the sink and shower into. That said, opening up the wall down below will be very invasive and exspensive. It involves removing multi-step crown-molding, wainscotting ect, and I'd REALLY REALLY like to avoid doing that if there is any way possible.
I came up with 3 potential solutions. I drew overhead and side/3d views of each to try and illustrate what I am proposing. I'd like to know if any are viable, or if anyone has any better recommendations for a solution:
1) Install a 3" 90 with 2" side inlet, where the horizontal drain turns down. That inlet would allow me to tie in the joint shower and sink drain line, which also has another existing dry vent from the toilet also tied in ( is this still needed). The sinks and shower will all have their own dry vent already. Do you see any problems with this?
2) install a 3" 90 with 2" side inlet under the closet flange, and tie the shower, sinks, and dry vent into that side inlet. The shower and sinks are dry vented upstream. This doesn't feel like the best solution in terms water flowing downhill (seems like it could jam up at that 90 intersection) but I have seen many plumbers online recommending a version of this to others for a wet vent, as preferable to solution #1 above. I am unclear as to why, but would like to get an understanding if this is better.
3) Where the toilet goes, Install a combo wye closet flange, or wye with 45, and 45 degree closet flange. Then, I could tie in the 2" drain line upstream in the wye. That 2" line would be the intersection of a dry vent (is this still needed), and the wet vent of the shower and 2 sinks (which are all still dry vented).
Apologies, this has been a tough deal to illustrate, and is making my brain hurt. Thank you again for any time and consideration.
