vent as a drain

Hi everyone I need some assistance on how to complete a plumbing assembly. I am in LA County so we use the UPC, I believe. I have attached pictures of the existing conditions and a few diagrams of what I think might work. Essentially I am wondering if I can build a soffit to carry the drain...

I've read online that it's ok for the shower and toilet to be on the same vertical drain/vent pipe. Seems risky, if the toilet clogs. But I can't figure out any other way to drain/vent the shower. I've attached a file showing what I'm thinking of doing. The shower line is 2", the stack is...

I'm looking to move my washer and add a utility sink into my garage. Can I tap into the vent line (see pic). There is a sink, toilet and shower on the opposite side of the wall. Will I have venting issues? Any help would be appreciated. I talked to a plumber last week and shared this pic and...

Adding a small sink to my stand alone basement toilet. Can I tie into the vent coming off my utility sink that runs straight into the main stack?

Remodeling a kitchen that is on the upstairs floor in a split-level home. Moving the kitchen sink to a new location (want it under the window). The new location prevents me from running the drain into the upstairs bathroom plumbing, like the old sink did. Instead, it appears my only option is to...

Charlotte Pipe 3X3X3X2X2 DWV SAN TE W/R and L SD INLET 3-in x 2-in x 3-in x 3-in Hub x Hub Schedule 40 Tee Item #1086122Model #PVC 00418 0800 I found in code that you can have a stack of shared drain / vents on this page...

I have a house with an existing basement full bathroom that has also been roughed out for another full bath (with a shower). I want to build out this second bath. For this second bath I don’t know exactly what’s under the concrete but there’s a toilet drain coming to the surface of the concrete...

Any suggestions or comments are greatly appreciated! I attached images of the original configuration in case it was useful and a potential new plan. While renovating a second floor bathroom I am going to be swapping the location of the sink and stand up shower (and replacing the stand up...

Hey all. Relatively new to plumbing and have been learning a lot reading through past threads on here. I decided to add a sink to my laundry room and in doing so, wanted to make sure everything that had been done by the previous owner was up to code, from the looks of it, it's not. The goal is...

Can I use the vent off a double fixture with 1/8 th bend as a drain for a lavatory