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 Need help with wet vent
Author: nicksab (CA)

Hey everyone

I need some advice regarding my drain layout. ( see picture)

I am in California under UPC

The toilet drain into a long sweep 90 then drop down with 2 45 degree into a wye on a 3" drain. The drain has a wet vent upstream of the wye. The wet vent is from a sink which is 2" all the way to the roof and connect to the 3"drain via a combo wye.

Would this satisfy code requirement? Is there any other way to do this?

Thank you for your

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 Re: Need help with wet vent
Author: steve (CA)

Looks good to me.

Post Reply

 Re: Need help with wet vent
Author: nicksab (CA)

Thank you Steve.

I was just concerned mostly about the toilet drain because it is higher than the 3" drain portion where the wet vent and dropping into it with 2 45 back to back.

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 Re: Need help with wet vent
Author: PlumberLoren (CA)

You point out the wye down in the vertical line which is not the most desired way to install but it will work. The closer the vent to the closet the easier it is to allow the vent to function. Sometimes you cannot install the way you want and have to resort to what can still work instead.

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 Re: Need help with wet vent
Author: packy (MA)

my code says the toilet can be 20 inches above its vent.
i would have turned the long sweep at a 45 and run it straight into the branch of the 3 inch "Y" with a 3 x 2 "Y" downstream of it for the vent. you also don't have a cleanout in the 2 inch pipe.

Post Reply

 Re: Need help with wet vent
Author: nicksab (CA)

@ PlumberLoren

I know that sometimes remodeling can make plumbing look funny. :-)

I am not sure which vertical line you are referring to. The wet vent is about 3" from the WC and is upstream of the closet WYE on the 3" waste drain.



Edited 2 times.

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 Re: Need help with wet vent
Author: nicksab (CA)

@ Packy

I think you are looking at the drain from the shower drain on the right side of the first picture. It does not have a cleanout because it is a p-trap going to a long sweep then into the vertical 3x2 WYE.

I am talking about the connection on the top left of the first picture where the sink drain comes down into a combo wye and serves as a wet vent for the toilet. the toile drain is coming from the top of the picture into 2 45 back to back then into a wye downstream of the wet vent/sink drain.

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 Re: Need help with wet vent
Author: sum (FL)

A bit confusing without annotations of what is what. Is the toilet drain elbow actually outside of the first picture and the 3" drain coming down on the top right of your first picture the toilet line? Also you said in your first post the sink wet vent is "upstream" of the wye, but your lastest post said it is downstream of the wye, is the sink wet vent actually upstream or downstream of the wye into which the toilet drain ties in or these are two different wyes you were referring to?

I think what Packy said was the 3" on the top right side of the first picture, if indeed that was the toilet line could tie in "better". You ran that line almost parallel with the main line and had to use two 45s, one to bring it lower and the other to angle it to the branch of the wye. Is there any reason you could not position the closet bend lower such that it is slightly higher than the main line by 1/4" per foot, then rotate the bottom of the elbow to point to the main line at a 45 angle, and where that rotated elbow intersects the main line is where the wye goes. That eliminates the two 45s, less joints and easier to snake.



Edited 1 times.

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 Re: Need help with wet vent
Author: steve (CA)

Sum, in the last picture, you can see the horizontal toilet drain has to clear the top of a beam, before it can drop down to the horizontal branch.

Post Reply

 Re: Need help with wet vent
Author: packy (MA)

nick, I can see that. code says that 2 inch drain from the sink must have a cleanout in it.
chances are it will not clog for the next 150 years but we plumbers must comply with the code..

Post Reply

 Re: Need help with wet vent
Author: nicksab (CA)

@ sum

I understand your point. Yes the 3" main drain runs parallel to the 3"WC drain. However, the toilet drain is 4" higher than the main and I can't lower it because of a support beam. I can go up but not down.

I could have the toilet drain go straight to the plywood in front. I would still need to use a 45 and a wye to drop it down so I can get a 3x2 wye for the sink drain/ wet vent. However the wet vent will be 2" and run horizontal for at least a foot before get into the 3 " drain.

The wet vent is upstream of the toilet wye on the main drain.

Post Reply

 Re: Need help with wet vent
Author: nicksab (CA)

@packy

The sink drain will have a cleanout. On the first pic, the open 3x2 wye is where the sink drain is connected to coming from the top. This 3X2 wye would serve as a cleanout for the main as well as the sink.

Post Reply

 Re: Need help with wet vent
Author: nicksab (CA)

Here is some ( really bad ) annotatiom






Edited 1 times.

Post Reply

 Re: Need help with wet vent
Author: sum (FL)

steve yes I see that now. I wasn't paying much attention to the second pic.

Post Reply

 Re: Need help with wet vent
Author: sum (FL)

nick, in the second pic, I see the toilet drain has to clear the top of a beam going across, while it runs parallel to a higher beam.

How far back is the toilet? That picture is blurry I see the pipe goes back and there is some more wood framing there, not sure if the drain runs through a hole in that framing, or if it turns up before it.

Post Reply

 Re: Need help with wet vent
Author: nicksab (CA)

Sum

The toilet flange is right above the beam. The long sweep 90 goes vertical a little after the center of the beam. I thought about using an offset flange but it is not enough to clear the beam. Using two 45 instead of the long sweep does not work either. :-(

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