plumbing plan review

Hi ! First post. We want to add a second bathroom to our house on the second floor. We have 8" floor joist (real 8"). 16" appart. My rules were: - Don't pass through a joist with the toilet 3" drain pipe. - Good venting - Run the main 3" drain parallel to joist (between 2 of them) to go down to...

Does anyone know if this plumbing plan is code? Can I tie in the shower drain plumbing into the existing sink drain plumbing with these fittings or do I have to take the shower plumbing directly to the main pipe? I would tie it into the main stack but I'm running out of room because this is the...

Long time reader, first post on this forum. We are doing a remodel and would like advice on reviewing our intended plumbing remodel plans. There are two full bathrooms, a kitchen, and utility/wash room. Living in Wisconsin I have been reviewing our code (SPS 382, 384, and 145) and would like...