dwv

Hello! So I moved into a house with a closet that used to be a laundry room. Back wall of the closet has a hole in the sheetrock where the washing machine outlet box used to be. In that hole: a capped DWV (and I assume supply lines, but I haven't opened the wall). I'm doing work in this wall...

I have been reading about plumbing codes and methods on this site for many years and I learned a lot but I still don't know everything so I must ask a question. I have removed all the cast iron DWV parts so everything will be PVC. I am also installing a full bathroom and seperate floor drain...

Will this get the job done? I tried to keep it simple since I am simple. let me know if I botched something up. Thanks!

I have a cramped system. In short, i have a 3" horizontal main. First it does a combination wye up to vertical (this vertical stack is packed full) it then continues horizontal and almost immediately goes into a 45 degree cleanout. I want to cut off the cleanout and attach a sanitary t at...

Good morning all .. I'm back to TL for a quick (hopefully) consult on replumbing a basement bathroom. Tore out an old 1950 bath and all the cast-iron involved. THAT is a good day's work and really makes me appreciate the craftsmanship (and muscle strength) of the plumbing trade in 1950...

Hey folks, Had a question come up about the main water supply line crossing below the main sewer line. The situation is as follows: Sewer line to septic is 3" PVC @ 18" depth coming through the foundation. Water supply line is 1 1/4 250 PSI Poly @ 5' depth and crosses under the sewer at ~45*...

From what I understand, it's generally safe to say that gurgling from a drain signals a venting issue. I'm looking for ideas to help diagnose which of two possibilities is in play. Feel free to suggest other possibilities that I have not considered. Possibility 1 - Negative pressure but with...

Thanks for all the great advice over the years!

Is it OK to start a vent off the 45 side of a wye? I don't see why it wouldn't but couldn't find an example of my situation on the internet, See attached drawing (sorry it's rotated wrong), Originally I was going to put a sani-tee after the trap arm start and start the vent with a 45 from the...

My plumber says the height of the drain from the kitchen above is correct. Maybe I’m over-thinking the height but I think it should be 12″ from the floor not 32″ as shown in the picture on the left hand side. My concern the bathroom sink drain is below the kitchen drain. Is he right?

I see tons of questions about a 90 being vent only (short sweep), but can't find anything about a 45. Is there a 45 elbow that's for a vent only, and not drain? In the attached screenshot, I'm wondering if the bottom 2 are for vent only? If not, what's the difference between the top 2 and the...

Hi all, thanks for the great resource! I've searched a lot but can't find an answer to my situation. Will my attached plan be functional and up to code if I open up my slab and tie into my 4" closet bend after the closet vent? Any ideas on the best way to route the drain once it goes under the...

On a 3" horizontal run, can I use a 22.5 fitting to drop under a floor joist and then correct it with another 22.5? Or is this considered changing from horizontal to verticle? The 22.5 degree slope would only be about 7" long but it will carry a bathroom group and kitchen sink with disposal...

Hello folks, Long time lurker, first time poster here. I am trying to come up with a design for the DWV system and could use some feedback. I plan on taking the proposal to the city building inspector before I start putting it together, but my experience so far is that they rubber stamp...

Hi all, My question is: Is there an advantage or disadvantage to using a sanitary tee over a wye + 45 vertically for drain/venting purposes? Do wye + 45 fitting have any purpose in a stack application? I checked the forums and have never seen this discussed. I know sanitary tees are never...

This is my first post to any forum ever, so I apologize in advance if I'm overlooking posting etiquette that I'm not familiar with. I have read DIY forums for years and this one is by far the best for plumbing, so I come seeking your advice. My question is - should replace all of my original...

I'm building my own home in a rural area. I have a professional installing an aerobic septic system. The entire house is solid wood and it has a metal roof. There aren't any wall cavities and the ceilings are vaulted without an attic space. So, I don't have space to hide vent pipes as they rise...

I am always stressing out when I am glueing large diameter ABS 3" and more. I realize I only have seconds to get it fully seated at the right twist. When I am glueing 2" and under, I have enough strength in my hands to push pieces together, and plenty of twist action. Sometimes I glue at the...

We are up for a water test inspection of our addition. Since the entire 180 sq foot addition is a DIY, I want to confirm a few things (after spending hours on this forum!) before we jump into this: All of our underground plumbing is located within our slab foundation. Because of this, no test...

I was wondering if anyone had advice on how I would add a new toilet into this location. Split level home with a slab on grade adjacent to a basement. The main sewer line runs under the slab (see pic). Would I cut a trench and bring the toilet waste pipe into the basement ,through the cinder...