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We are repurposing our old bathroom into a pantry. I would like to move this utility sink to the corner and run the trap arm to the existing wall adapter, which has a 1.5" ID. I don't understand how/why the trap pipe diameters are different than the normal pipe diameters. How do I go about...

I am installing this shower kit and realized that I should not have primed and painted the mildew resistant drywall, but that ship has sailed. https://www.lowes.com/pd/DreamLine-Infinity-Z-White-3-Piece-36-in-x-60-in-x-79-in-Base-Wall-Door-Rectangular-Alcove-Shower-Kit-Left-Drain/5014370029...

All the planning in the world, and somehow my DIY decision making went awry. Instead of using a drop ear that would allow me to screw in a shower arm, I simply stubbed out the 1/2" copper with an elbow, while securing the pipe to a cross backer board below. Do I need to cut out the drywall or...

This site has been incredible to me for years and here is my chance to contribute. Here in Columbus, OH, positive pressure testing is not available for rough inspection and in my case, I did not want to perform a test with water as failure would result in water damage to the existing interior...

I find sweating copper very easy to do, yet these large mass brass fittings always give me trouble. I used Oatey's No 9 tinned flux to sweat a shower valve and 3 of the 4 joints give me worry. I am not sure if the flux burns off, but I could see it bubble then stop. I don't recall much smoke...

I am down to the last part of my room addition; the supply lines. I have always used copper, but my friend has a Pex B crimp tool and I know it would be a huge time saver, plus less time in the crawl space. I currently have 3/4" supply coming into the house that feeds the water heater. Every...

I am nearing the end of my DWV install and terminating the closet and shower drains are confusing me. I do have access to the crawl space under both fixtures. I tend to overthink things, but I can't seem to convince myself it will be easy. I have a stainless steel flange that will fit over...

I am hoping that I can get some advice... New addition to the first floor; relocating the bathroom and adding a shower. In the end, a bathroom group (5 DFU) and a utility sink (2 DFU) will be vented. I want to route the vent to the attic and tie in up there, but I am not sure that I can. The...

I am DIYing the plumbing in my new addition and planned on tying the drains into the main stack in the basement and also the vents into the main stack in the attic. As with all of these projects, little questions pop up that I did not anticipate, like this one: If I am going to insert a hard...

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

I am running all drain the lines from a new first floor addition over and through the existing foundation wall, and to the stack in the unfinished basement; sink, shower, and toilet. I am running the vent lines through my cape cod's front knee wall, above the stairs, and tying it into the...

I have read in these forums various materials used to decouple the mortar bed from the OSB subfloor, but I question its purpose. If the shower pan is being screwed into the studs it makes sense, but the Dreamline shower pan I am using does not. It seems to me that I would WANT the mortar to...

I get leaking in several cracks in my basement's poured foundation walls. The sump pump has water draining to it and it works well. I received a quote for 126 feet of interior drain tile to be replaced is $12K. My current drain tile is white 3" PVC. Before replacing it, is it common for...

I have always seen the advice to regularly replace the supply lines for faucets and toilets. I actually had a polybutylene pipe burst overnight and woke up to a inch of water in our slab-home. I replaced every supply line in my current home when I moved in 6 years ago. I used the metal...

I currently have this setup in my two story home's basement. I am pretty sure that the standpipe penetrates the slab then take a 90° turn before terminating into the vertical floor drain pipe. I don't believe there is a trap in the run of the standpipe. I am moving the laundry room up to the...