Hi. I've embarked on a renovation project which consists of knocking down a non-load-bearing wall to combine an existing (2-piece) ensuite with a walk-in closet. Our objective is to use the additional space to expand the existing ensuite bathroom, most notably add a walk-in shower. This expanded room (the wall has already been removed) is situated adjacent to another full bathroom serving the other 2nd floor bedrooms. That said, all the plumbing pipes, drains, and vents are in the wall and are now exposed when I removed a piece of greenboard. In addition, plumbing for the existing ensuite is also in place.
I've made a drawing to reflect re-routing of supply water pipes and the addition of new DWV to serve the new walk-in shower as well as the relocation of the vanity.
I realize codes are different from jursidiction to jursidiction but I'm looking for professional feedback. Does anyone see areas of concern?

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Originally Posted by JSD

Hi. I've embarked on a renovation project which consists of knocking down a non-load-bearing wall to combine an existing (2-piece) ensuite with a walk-in closet. Our objective is to use the additional space to expand the existing ensuite bathroom, most notably add a walk-in shower. This expanded room (the wall has already been removed) is situated adjacent to another full bathroom serving the other 2nd floor bedrooms. That said, all the plumbing pipes, drains, and vents are in the wall and are now exposed when I removed a piece of greenboard. In addition, plumbing for the existing ensuite is also in place.
I've made a drawing to reflect re-routing of supply water pipes and the addition of new DWV to serve the new walk-in shower as well as the relocation of the vanity.
I realize codes are different from jursidiction to jursidiction but I'm looking for professional feedback. Does anyone see areas of concern?

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Your drawings refused to download. I disengaged my firewall so it wasn't that.
Try uploading them again. Thanks, tom

OK. Here's the file again, only this time in a jpeg format.

Basically your lay out looks OK. Our codes dictate 4" for toilets under a slab and 2" for drainage and vents. I hope the revent system teis back into the 3" vent stack because if it don't all you have is a closed system with no vent outlet. Also you need to rethink your fittings. Your thoughts? Tom

Hi Tom. I'm quite pleased with your assistance. Jurisdictional code differences aside, I think I'm ready to proceed with a permit application.
Just to be sure, this is an image of what I'm calling (on my drawing) a wye/tee. Is this the same thing as a drainage tee or is there a difference?
Although not too clear on my drawing, this vent system does tie into the 3" vent stack leading upward to the roof.

What you have pictured is a drainage tee, (see image) and is not the same as a Tee-Wye Combination,(see image). I would change some of my terms before I submitted the drainage for approval. The fitting terms are misleading.
Although your basic layout looks good and I can find no outstanding mistakes, in my area, (Tampa Bay) code does not allow 3" and 1 1/2" under the slab and most of our local codes call for 2" vents plus one 3" vent per house.
Check with your local Building Department.
Good luck, Tom

I certainly will. Thanks for the clarification. I'll modify my terms right away to avoid being misleading.