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I am currently planning out the framing portion of my project and I am trying to figure out what is what with the rough in plumbing you see in the picture. I don’t have any plumbing experience and plan to hire someone for that part but I want to know what’s what so I frame accordingly. Anyone know? Thanks in advance.

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    This looks like new construction so the information you're requesting should be on the plumbing plans. The 4" cap on the floor with the square protruding top looks like a drain cleanout , the 2" pipes look like drains or vents and the "maroon" covered hole appears to be for a toilet but I'm just guessing on this. – JACK Aug 3 '19 at 22:25

I think Jack is right--here looks to only be one water line so that maroon would be for the toilet. I would expect the vent to be in the wall, and the 1-1/2" or 2” pvc to be a sink drain. The toilet was probably planned to be at a 45 degree angle.

A sink requires a outlet within 36” so that electrical may be for that once the studs have been installed on the stem wall. With only one water line an on-demand or small water heater may have been the plan.

  • I agree except for the angled toilet thing. That would be weird. I've never actually seen it done. – isherwood Jan 2 '20 at 16:36
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    I have one in my current house that way when I purchased. But have installed 45 degree toilets and sinks several it makes the area feel larger by not being parallel with the wall and also feels modern since it is unusual. I started doing this about 30 years ago on a bungalow bath that was so small I could wash my hands while sitting down. But today I have done it on large bathrooms also makes room for a small cabinet behind the toilet and room for a proper vent without a staggered wall. I put them in my last 2 homes and they ended up as a plus when selling. – Ed Beal Jan 2 '20 at 17:00
  • @EdBeal How do you install a toilet at 45 degrees and meet code. The code requires a clearance along the side of the toilet and the 45 degrees would cut a portion of that off. – Lee Sam Jan 2 '20 at 18:41
  • @isherwood The reason you’ve never seen a toilet installed at 45 degrees is because it doesn’t meet code. – Lee Sam Jan 2 '20 at 18:43
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    Ten seconds in Google indicates the existence of corner toilets. I can't imagine American Standard would manufacture and sell something that couldn't legally be installed. – T.J.L. Jan 2 '20 at 21:03

The OP shows a typical corner in a bathroom with the toilet waste located near the corner.

Based on that, the code requirement (See ICC Figure 307.1) for clearances is 15” minimum from center of toilet to side wall or obstruction (cabinet, tub, etc.) Here is the code layout:


Please notice that the 15” side clearance runs all the way to the wall. This is impossible with a corner toilet. See American Standard CORNER toilet:


As you can see, the tank is about 20” wide where it meets the wall. In order to meet code, the tank would need to be 30” wide.

So, let’s assume Ed and the OP intends to build a diagonal wall and install a standard toilet on that wall. In order to meet code, the wall would need to be a minimum of 30” (actually it would need to be 32” after gypsum board is installed and still obtain the 30” minimum clearance.)

In order to build such a wall, it will need to be a minimum of 16” out from the corner...and clearly it would cover the existing rough-in.


1) A corner toilet does not meet code, and

2) The OP cannot build a diagonal wall and meet the code with the required clearances, unless they chip out the concrete slab and move the existing rough-in.

(Btw, in my comments, I didn’t say a corner toilet can’t be installed or is never installed, I said it doesn’t meet code. I’m surprised Lane County allowed such an installation, because the are known for strictly following the code.)

  • The 15" side clearance - isn't that code requirement for a standard, non-diagonal install, with the toilet perpendicular to one wall, and another wall on the left or right? And that requirement I thought was based on needing room to sit and get up from the seat without having the wall interfere. With a diagonal mount toilet, you always have at least 15" from center of the bowl to the wall. So the 15" requirement is met with any diagonally installed toilet. – SteveSh Jan 3 '20 at 0:41
  • @SteveSh The code does not have an exception or alternate layout for a diagonal installation. Diagonal installation DOES NOT meet code. – Lee Sam Jan 3 '20 at 1:03
  • No walls are there yet so as you down vote and challenge me I downvote this answer as I have passed 3 inspections on permits and I am an electrician by trade. licensed professional trade not a plumber Working on the side in the construction trade as I was raised and I have not failed a inspection. I post when I down vote the reason. Many cowards do not and my reason for upvoting a question that a new DIY may have that some down vote without explanation. – Ed Beal Jan 3 '20 at 1:07
  • @Lee Sam: Which requirement in the code is not met? I looked over the excerpt from ICCSafe you provided and could find anything that would preclude a diagonal installation. – SteveSh Jan 3 '20 at 1:08
  • @EdBeal I haven’t down voted you...yet. I tried to explain that a diagonal installation does not meet code and gave my reasons why. If you were down voted, it’s no reason for retaliation. Just because you “passed inspection “ does not mean it meets code. – Lee Sam Jan 3 '20 at 1:16

Here's why I think a corner mount toilet meets code. This is takn from one of the references Lee Sam provided. The measurements in RED were scaled from the American Standard drawing and may be off by an inch or two.

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  • Good idea steve but the corner toilets I do have ~18 inches of flat wall behind them the tank is free and clear to both sides so there is a slightly different approach with a standard toilet that has been legal on multiple permitted installs. + for your description but it is different than my description – Ed Beal Jan 3 '20 at 1:11
  • Steve, that’s not where the 15” dimensions are taken from. Close, but not quite accurate. You can’t make up your own diagram and create your own dimensions. – Lee Sam Jan 3 '20 at 1:24
  • Lee - I didn't make up that diagram or the dimensions. It came from the document you provide. You still haven't answered my question as to what code requirement is being violated. – SteveSh Jan 3 '20 at 1:36
  • @SteveSh I did answer your question. Re-read my answer: it’s in the second sentence. – Lee Sam Jan 3 '20 at 3:57
  • @Lee - which answer??? "Close, but not quite accurate"? – SteveSh Jan 3 '20 at 11:38

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