I have built and addition to my home and did my own plumbing. I have a question about draining and vents. Here is the way I vented my toilet and sink in the bathroom. Please see image here and tell me if this is correct. If it is not correct, please tell me what will happen if I leave it like this. Thanks for any help.

Its incredible what you can do with an etch a sketch! LOL! It is hard to tell the arrangement of your fittings underneath the toilet. Almost looks like an upside down wye fitting with a 90 degree elbow going to the sink and vent. That of course would be wrong! If you used a tee fitting on the vertical run to go to the sink and vent that is fine but will have a possibility of a gurgle. If you used a wye fitting on the horizontal run that is also fine. That is commonly known as a wet vent. Not every municipality allows wet venting but it works!

Chayn is correct. You're wet vented and in my area (SPC) it passes coode. This is how we rough in our bath rooms, (see image).
Good luck, Tom

Ok.. thanks a lot guys. Here is a revised drawing.. it is more accurate and shows the fittings. Let me know if it changes your thoughts or not. Thanks again so much.

Ok, a tee on its back for a drain fitting is against code. BUT, you can use a heel outlet 90 which is pretty much the same thing so it should work.

Thanks CHayn. I am using a sanitary tee like here with the flow being being directed where the crap is supposed to go. The inspector has already signed off on the plumbing... but he didn't crawl up into the crawl space to look at it. Seems like you experts think it work fine though.

I agree that a sanitary tee is way out of code and Like Chayn I would rather see a combination wye and eight bend or a heel inlet elbo but if you passed inspection give it a try. If there's a problem it can always be replaced, I hope this willl be installed in a crawl space and not under a pour. Good luck, Tom

Hi Speedball. I'm not a plumber so I didn't know what a wye was.. so I looked it up in Google and saw a picture here: And would you believe it.. it actually DO have a wye there. I just thought it was a different kind of Tee. It is in the same position as the image I'm referencing.

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Originally Posted by whburgess

Hi Speedball. I'm not a plumber so I didn't know what a wye was..so i looked it up in google and saw a picture here: And would you believe it..it actually DO have a wye there. I just thought it was a different kind of Tee. It is in the same position as the image i'm referencing.

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If it's looking up then you have correctly installed a combination wye and eighth bend, (see image). Good luck, Tom

Actually it is installed in this position http://i1021.photobucket.com/albums/...EighthBend.jpg
And I have installed two of them in a row.. just like in my drawing here http://i1021.photobucket.com/albums/...oiletvent2.jpg

Works for me! Good luck, Tom

Agree with Tom: that combination Y and 45 makes waste water to flow better. Also, if you ever have to snake it, the snake will make the turn w/o problem. Good luck getting 3/4" snake through Sanitary T... Good job