SLOJim
New Member
My wife and I have been remodeling our 1963 house for the last 25 years and we have finally gotten around to our bathroom. Yeah, we are a little slow. It's single level with cast iron horizontal line under a far too thin concrete slab that then transitions to a clay pipe lateral once it clears the slab. Over the years the original shower pan failed and was replaced with a tub at the expense of the toilet. Our plan calls for cutting into the 3" cast iron and adding a toilet and shower. I am both totally new at DWV design as well as forum usage so I apologize ahead of time for the many mistakes I am about to make.
The cast Iron horizontal run has been scoped out and looks solid and clear and should be 24 inches below the slab. My goals are, in order of priority:
1) Obtain the best draining and venting using a single 2" vent.
2) Provide a full size cleanout hidden in cabinet for new 3" section.
3) Minimize slab destruction/reconstruction.
4) Be code compliant with CA 2021 pluming code which is based on UPC 2021
Below you can see the original layout and what I hope to finish with. In the original, the (red) shower was removed
In the future layout below red toilet shower combination is what I plan on adding.
My instinct to keep it simple keeps coming back to the layout below where both the shower and the WC drop into the same vertical which is also the the same pipe that has the cleanout and the vet stack headed for the roof. It is so simple and obvious that it can't possibly work. But here it is anyway as option 1:
The next option on my mind (Option 2 ) moves the WC connection from the Vertical pipe to the horizontal while still keeping the shower feeding into the vertical pipe.
I apologize again for the giant data dump. How close am I? If either of these are close my next step would be an exploratory hole to verify the 3" cast iron pipe location, conditions and depths are accurate. Then it's commitment time.
Thanks in advance. I have watched this forum in the past before joining and I have been amazed at how helpful and brutally honest the community is.
Jim
One additional option which I had ruled out before since it appeared it would drop off the WC and the Shower at the same elevation was the use of a 3x3x3 Sani tee with right side 2" inlet. Technically the put the 2" sightly above the 3" and not straight across but at a 90 degree angle so I am feeling more comfortable about that. It would now look like :
The drawing looks like the two traps are pointed at each other but they are 90 degrees apart. This has now become top option to add to the mix.
Thanks
Jim
The cast Iron horizontal run has been scoped out and looks solid and clear and should be 24 inches below the slab. My goals are, in order of priority:
1) Obtain the best draining and venting using a single 2" vent.
2) Provide a full size cleanout hidden in cabinet for new 3" section.
3) Minimize slab destruction/reconstruction.
4) Be code compliant with CA 2021 pluming code which is based on UPC 2021
Below you can see the original layout and what I hope to finish with. In the original, the (red) shower was removed
In the future layout below red toilet shower combination is what I plan on adding.
My instinct to keep it simple keeps coming back to the layout below where both the shower and the WC drop into the same vertical which is also the the same pipe that has the cleanout and the vet stack headed for the roof. It is so simple and obvious that it can't possibly work. But here it is anyway as option 1:
The next option on my mind (Option 2 ) moves the WC connection from the Vertical pipe to the horizontal while still keeping the shower feeding into the vertical pipe.
I apologize again for the giant data dump. How close am I? If either of these are close my next step would be an exploratory hole to verify the 3" cast iron pipe location, conditions and depths are accurate. Then it's commitment time.
Thanks in advance. I have watched this forum in the past before joining and I have been amazed at how helpful and brutally honest the community is.
Jim
One additional option which I had ruled out before since it appeared it would drop off the WC and the Shower at the same elevation was the use of a 3x3x3 Sani tee with right side 2" inlet. Technically the put the 2" sightly above the 3" and not straight across but at a 90 degree angle so I am feeling more comfortable about that. It would now look like :
The drawing looks like the two traps are pointed at each other but they are 90 degrees apart. This has now become top option to add to the mix.
Thanks
Jim
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