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Old 05-21-2016, 08:01 AM   #1
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Can toilet branch be downstream?


Building code aside (I'll check on it) can a toilet branch be downstream of other fixtures and the vents in a full bath? Pic Below:
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Old 05-21-2016, 02:15 PM   #2
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Re: Can toilet branch be downstream?


Whats the point if all your worried about is gluing pipe together no matter the result go for it.
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Old 05-21-2016, 02:42 PM   #3
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Well let's see. I asked the question on a plumbing forum and said I would check the code. Even a person of moderate intelligence would conclude that I do care about what I'm doing. Now I'm not saying that you're not intelligent, but I'm not not saying it either.

Maybe you have a reading problem, maybe you have a comprehension problem, maybe you're just being a condescending douche bag. What ever the case, you should consider a different hobby.
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Old 05-21-2016, 03:59 PM   #4
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Re: Can toilet branch be downstream?


Though my plumbing knowledge is severly lacking.. I see no problem with it. In fact id prefer black water be down system of grey water (call me odd). And I thought as long as vented within a certain matter of feet (which usually includes the whole bathroom) it is covered.
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Old 05-21-2016, 04:44 PM   #5
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Re: Can toilet branch be downstream?


Yeah, I agree. I've read a lot of opinions that fixtures upstream will help removal of the solid waste. The old configuration actually did have the toilet branch downstream of the tub and first vent, but where I want to move it puts everything upstream of the toilet branch. I just want to make sure that's not an issue.
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Old 05-21-2016, 05:00 PM   #6
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Re: Can toilet branch be downstream?


Here's a new photo with a solution that would fit...I just need some feedback on whether there are any potential issues.
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Last edited by costgeek; 05-21-2016 at 05:03 PM. Reason: and the pic...
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Old 05-21-2016, 06:40 PM   #7
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Re: Can toilet branch be downstream?


Looks good to me. But let the others chime in their opinions.
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Old 05-21-2016, 07:53 PM   #8
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Re: Can toilet branch be downstream?


You cannot use sanitary tees on their side or back as drainage fittings
I don't horizontal wet vent so you need to refer to your code for that- or wait for ghost to respond again. He inspects this type of code daily
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Old 05-21-2016, 09:19 PM   #9
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Re: Can toilet branch be downstream?


Good catch thats right.. you need wyes to make those connections.
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Old 05-22-2016, 02:44 AM   #10
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Re: Can toilet branch be downstream?


And you need 3 inch to your vanity is picked up. You are only allowed 4 DFU on a 2 inch wet vent. Also the dry horizontal vent under the shower floor is illegal. All dry vents must rise vertical until 6 inches above the flood level rim of the fixture served. Before turning vertical. All code applied is IPC so look it up. Chapter 9.

Yes they are correct no tees are allowed to be used in that position they must all be wyes. That you will find under chapter 7.

905.3 Vent connection to drainage system. Every dry vent connecting to a horizontal drain shall connect above the center-line of the horizontal drain pipe.
905.4 Vertical rise of vent. Every dry vent shall rise vertically to a minimum of 6 inches (152 mm) above the flood level rim of the highest trap or trapped fixture being vented.


909.3 Size. The dry vent serving the wet vent shall be sized based on the largest required diameter of pipe within the wet-vent system served by the dry vent. The wet vent shall be of a minimum size as specified in Table 909.3, based on the fixture unit discharge to the wet vent.
706.3 Installation of fittings. Fittings shall be installed to guide sewage and waste in the direction of flow. Change in direction shall be made by fittings installed in accordance with Table 706.3. Change in direction by combination fittings, side inlets or increasers shall be installed in accordance with Table 706.3 based on the pattern of flow created by the fitting. Double sanitary tee patterns shall not receive the discharge of back-to-back water closets.



TABLE 709.1
DRAINAGE FIXTURE UNITS FOR FIXTURES AND GROUPS

Last edited by Ghostmaker; 05-22-2016 at 02:52 AM.
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Old 05-22-2016, 02:59 AM   #11
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Re: Can toilet branch be downstream?


Quote:
Originally Posted by costgeek View Post
Well let's see. I asked the question on a plumbing forum and said I would check the code. Even a person of moderate intelligence would conclude that I do care about what I'm doing. Now I'm not saying that you're not intelligent, but I'm not not saying it either.

Maybe you have a reading problem, maybe you have a comprehension problem, maybe you're just being a condescending douche bag. What ever the case, you should consider a different hobby.

You said this

"Building code aside"

That would infer to any reasonable person that you did not care if your installation would meet the plumbing code for your state.

I gave you all the pertinent code issue you have the first one to address is your illegal use of venting. IPC does not allow any dry flat vent under a fixture. That means you need to redesign your bathroom to accommodate to the code. You also should make sure you get all permits and inspections as required by your local building department if any. So check the last post with all code sections that are pertinent.
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Old 05-22-2016, 07:21 AM   #12
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Re: Can toilet branch be downstream?


Quote:
Originally Posted by Ghostmaker View Post
You said this

"Building code aside"

That would infer to any reasonable person that you did not care if your installation would meet the plumbing code for your state.
I also said that I would check the code. Any reasonable person would infer that means that I do care about meeting code.

I wanted to know if fixtures upstream of a toilet branch was an acceptable practice, then I could research the details on how to do it right. I also wanted feedback on this practice, even if it was legal. Just because something is legal, doesn't mean it's the best way to do it. This is why I said "building code aside".

Don't get me wrong, I do appreciate the help. But this is a DIY chatroom, and DIYers shouldn't be belittled when they are trying to learn.

Last edited by costgeek; 05-22-2016 at 07:27 AM.
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Old 05-22-2016, 12:01 PM   #13
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Re: Can toilet branch be downstream?


You have the relevant code sections. Now the ball is in your park.
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Old 05-22-2016, 12:02 PM   #14
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Re: Can toilet branch be downstream?




Your allowed 1 fixture upstream of the wet vent itself. It also must be with in the vent to trap distance from the wet vent.
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Old 05-22-2016, 12:06 PM   #15
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Re: Can toilet branch be downstream?




Another example showing the proper use of fittings.
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