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Old 04-08-2016, 06:46 PM   #1
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toilet vent layout picture


Am I able to vent a toilet this way? Want a 2" vent for toilet and will only be for toilet.
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Last edited by PandJ; 04-08-2016 at 07:01 PM.
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Old 04-08-2016, 07:01 PM   #2
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Re: toilet vent layout picture


You cannot dry vent any fixture under IPC below the flood level rim of the fixture.
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Old 04-08-2016, 07:07 PM   #3
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Re: toilet vent layout picture


Same with UPC ? Also, to make sure my post is clearer, The 2" will have a 45 at the wall appx 12" behind it and go up above the fixture through the roof line as vent.
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Old 04-08-2016, 07:37 PM   #4
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Re: toilet vent layout picture


How about this way with vent after toilet?
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Old 04-08-2016, 08:51 PM   #5
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Re: toilet vent layout picture


You must maintain a consistent 45 degree or better angle. Any thing less in any part is illegal under IPC. What code are you under?
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Old 04-08-2016, 08:53 PM   #6
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Re: toilet vent layout picture


Quote:
Originally Posted by Ghostmaker View Post
You must maintain a consistent 45 degree or better angle. Any thing less in any part is illegal under IPC. What code are you under?
UPC. Got it ,so no sweep or wye needed, just 45 off down "stream" of flow. Ok to 45 from at point near second pic ?
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Old 04-08-2016, 10:25 PM   #7
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Re: toilet vent layout picture


This ok? It will be only fixture on this vent. The second is what i originally was going to do.
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Last edited by PandJ; 04-08-2016 at 10:30 PM.
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Old 04-08-2016, 11:15 PM   #8
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Re: toilet vent layout picture


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Originally Posted by PandJ View Post
This ok? It will be only fixture on this vent. The second is what i originally was going to do.
I pipe as your first image shows, but it usually has the lave draining into it. AKA, wet vent.
Roll the 3x2 above the center line of the 3"
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Old 04-09-2016, 12:53 AM   #9
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Re: toilet vent layout picture


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I pipe as your first image shows, but it usually has the lave draining into it. AKA, wet vent.
Roll the 3x2 above the center line of the 3"
hmm...so to be sure i under stand, when you say "roll", just have the wye straight up, then 45 off of that or 60 maybe?
Also, the tub drain could easily be drained into the toilet 4"(what I'm using) but I was concerned that a 2" vent would not be ok for both tub and toilet. I'm held to UPC here in my town
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Old 04-09-2016, 01:30 AM   #10
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Re: toilet vent layout picture


i think this is what i'm looking for and what posters have suggested

No flat venting. Vent pipe inverts taken off above the center line of the drain. (UPC 905.1 & 905.2)
 Vents downstream of trap. (UPC 905.2)
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Old 04-09-2016, 09:03 AM   #11
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Re: toilet vent layout picture


Your picture shows the 2" above the center line of the toilet. In the end, your inspector will have the final say- he may say that is a flat vent and not allowed. I plumb under UPC and it is excepted in my region. But if you strictly interpret the code- it is not allowed except when structual conditions force you to do the flat section.

The tub will need a vent unless you design your system according to the UPC horizontal venting requirements. Or the tub can drain into the vertical section of the toilet vent
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Old 04-09-2016, 05:36 PM   #12
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Re: toilet vent layout picture


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Your picture shows the 2" above the center line of the toilet. In the end, your inspector will have the final say- he may say that is a flat vent and not allowed. I plumb under UPC and it is excepted in my region. But if you strictly interpret the code- it is not allowed except when structual conditions force you to do the flat section.

The tub will need a vent unless you design your system according to the UPC horizontal venting requirements. Or the tub can drain into the vertical section of the toilet vent
Ok so I think your saying UPC ok with vertical drain off of a wye into watercloset drain before it gets to main vertical line(in my case). Is the pic ok? The 2" wye will be from tub. Also, can the 2" vent from tub serve as the toilet vent also through the wye?

I think this is the UPC that pertains to this:
706.2 Horizontal to Vertical. Horizontal drainage lines, connecting with a vertical stack, shall enter through 45 degree (0.79 rad) wye branches, 60 degree (1.05 rad) wye branches




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Old 04-09-2016, 07:22 PM   #13
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Re: toilet vent layout picture


Here what I have modeled

Toilet, eye feeding tub drain and vent (45 in center), tub ptrap. Vent will be 2" thru roof for just these two fixtures.

I can also add vent upstream 4" vent on ground. It will be clean out
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Old 04-10-2016, 09:54 AM   #14
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Re: toilet vent layout picture


If you have that much room to plumb- do it like this-- It will be code compliant
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Old 04-10-2016, 12:13 PM   #15
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Re: toilet vent layout picture


Ok so ok if tub drains in from above toilet. I will do this if below is not final option

One other question I have is it possible to vent upstream of 4" main towards cleanout? (see pic) There is a kitchen sink, bath sink that are vented with 1 1/2 " independently before going to main, and a laundry drain also vented independently before going to main, all downstream of toilet.

I'm trying to make flows as simple as possible from my rookie position lol
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