dwv

Hi everyone, I am trying to figure out DWV plumbing layout in a 2 x 4 wall with the least amount of holes in framing members. The plumbing is for an upstairs bathroom with a double vanity where the drain/wet vent is already plumbed to the far right of both sinks (instead of in between). I am...

Good day Gentlemen, Picture 1 - This is my very first post. I was reading around this forum and it looks like the best form around, so I'm looking forward to your expert opinions on my DWV Layout. This is a complete bathroom renovation using mostly existing drainage. I have marked up in the...

Good Day, Plumbing Gurus, I am seeking advice on how to properly drain and vent two back-to-back toilets in a symmetrical bathroom layout under a 4" slab on grade foundation with down-turned footers. This is new construction, I am owner/builder, and am new to plumbing and trying to research and...

Doing your major remodel in Florida slab on grade can you guys check my drain layout and see if you see any problems? Top bathroom has the toilet at the end of the line and does not require venting in my area. I am concerned that it may suck the water out of the shower trap if the 2 ' wet vent...

I am having to re-plumb my bathroom, and am trying to follow IPC 2018 as best I can (I live in Vermont). The current Stack Vent, which exits the roof, is 3" copper and currently only vents the toilet. As I am now replacing the toilet, and remodeling the bathroom, I figured it was a good time to...

I'm adding a DWV system to a basement and need to tap into a 3 in dry vent stack that currently serves a 1st floor bathroom with toilet, tub and lav. As you can see, there's not much room here. The 1st solution that comes to mind is to add a 3x3x1.5 santee above the existing. This involves...

I made a post earlier about this, but it was kind of a jumbled mess . So now I've clarified some things, here it is again. I'm redoing an ancient basement bathroom/laundry room. This is IPC in North Carolina. The current setup has a long sweep 4in cast iron elbow dipping under the 4in slab and...

Can you all show me how IPC section 917 on single stack vents could be used for two bathrooms (tub, toilet, lav) that are stacked on top of one another (first floor, second floor). My appreciation is that the code generally doesn't allow toilets to be in a vertical stack, but that you can have...

Does anyone see a code violation with this design? My municipality uses 2012 IPC. It's for stacked bathrooms, with lav, toilet, tub/shower + a washing machine in two-story home. Slab on grade, so the lower fittings are in the earth. I'm proposing 1.5" fittings for everything except the...

I am installing PVC for bathroom drains in a residential home that is slab-on-grade. Question 1: Should I use PVC Schedule 40 for pipes and fittings that are in and under the slab? Question 2: Assuming the answer to Question 1 is Yes. How do I transition from PVC Schedule 40 for those...

Hi, I am in the process of DWV plumbing for upstairs renovation. Originally I had the washing machine tying in upstairs, but I am going to need to move as it will affect wet vent venting of one the downstream wet vented toilets. I am not able to tie it in upstairs and so will need to tie it on a...

Hello! I'm a DIYer planning out our basement remodel. I'm trying to get everything all laid out before filing for permits. Location is Spokane County, WA. Code is UPC. I'm currently working on the DWV layout. I am trying to figure out the best layout for the drain system. It will all be...

Hi all, I am currently installing a 1st floor Bathroom. The plumbing for both floors is currently accessible so I would like to make sure this plan for drain and venting should work. The 2nd floor is a converted attic/living space so separate roof vents would prove difficult. I'm hoping to...

I've scoured the forum and did not seem to find the exact answer to this question. We are doing a poolhouse and here is my proposed setup. I see that a bathroom group can have a wet vent in place to service that group (sink, toilet, shower). In the very next room, I have a washer that will...

Hello - I need advice on how to test the DWV system I installed for my basement remodel. I added a drain for a wet bar that I tied into an existing drain stack that the builders roughed in for the basement bathroom. I tied in below the stub out for the bathroom sink in the attached picture. I’m...

Hi, my daughter is remodeling her guest bath on a home she recently purchased. Small, semi-functional bathroom we are trying to update and make more functional. Existing layout had a 20" vanity, toilet and big open space to tub (pic of old space). Going to be moving toilet about 10.5" toward the...

House has 2 bathrooms with mirrored fixtures on either side of the “wall”. Currently, this is framed as 2 separate walls with a small chaise in between. Due to the small dimensions in the owner’s bath and the framing needing to be replaced between the 2 bathrooms already, I’m considering...

I am very limited on space and trying to figure out what would work. The line will then travel about 8 feet and then turn vertical, then back horizontal to connect into a wye combination. happy to answer any questions.

Toilet flushes in one particular bathroom always try their best to suck nearby traps dry. Now that I'm renovating that bathroom I want to take the opportunity to install proper venting. The attached files show the existing configuration, and my (incomplete) proposed changes. My questions are...

3" pipe coming over the wall. Are either of these layouts incorrect, or either one preferred?