venting and fittings

I would like to remove the existing toilet flange and 3" drain in the middle of the image and relocate the toilet flange and 3" to the right branch in the picture.

Question: can I use a 3" X 2" wye like you see in the middle, branch off to the left which runs to the shower trap then attach a short length of 3" PVC to the end of the wye located in the middle of the image and connect a 3" 45 and head down the right branch where my new toilet flange will be?

If not, what fittings and will allow me to creat this set-up?

Second Question: (not pictured) the shower and toilet drains obviously meet up at the wye and then continue on to the lav drain. Would running a 2" vent up from the lav to the future vent be adequate for venting the shower, toilet and lav, or should I run separate vertical vents for each fixture?

Thank you all and I hope this makes sense.............idoc

1. Yes, if I am following you correctly.
2. 2" is fine to wet vent a bathroom as long as your arrangement is correct and you can actually wet vent in your jurisdiction.

The problem you're going to run into is that you'll need to move the wye downstream in order to line the 45 up with the new closet flange location, then you're drain isn't going to line up for the shower anymore.

I'm not a plumber, but I think you could use a double wye, bush down to 2" for the shower drain, and then run the straight through to a non-de-script location a put a cleanout there...?

Hello,

The problem you're going to run into is that you'll need to move the wye downstream in order to line the 45 up with the new closet flange location, then you're drain isn't going to line up for the shower anymore.

I'm not a plumber, but I think you could use a double wye, bush down to 2" for the shower drain, and then run the straight through to a non-de-script location a put a cleanout there...?

Click to expand...

I agree with dlarrivee.. I think instead of doing the things self you should take advice and help from a plumber. He will give you the proper suggestion.There are many Sewer Line Replacement company who provide you help at your door step.



Regards,
Olivia

Actually, keep the wye as is, bust a little more concrete and use (2) 45's to your new location.

Thank you

Thanks, guys.

I will be able to use a double wye and reduce the left side down to 2" for the shower. I'll also put a wye on the right branch to vent the toilet, since the toilet will be about 10' from the lav vent.

idoc

You are best not to use a double wye flat like that.
You can't tilt the outlets up for grade.

You can use a double wye on the vertical.

Two wyes, tipped for grade should be used.

olivia751 said:

Hello,



I agree with dlarrivee.. I think instead of doing the things self you should take advice and help from a plumber. He will give you the proper suggestion.There are many Sewer Line Replacement company who provide you help at your door step.



Regards,
Olivia

Click to expand...

Olivia, I never said that he should hire a plumber. I was disclaiming myself, before offering advice because I am not one...
In fact if you look at the top of this page eventually after remodel you will the see the letters DIY... What's the point in telling everyone to hire a pro on a diy help forum?

Terry has cleared up and error in my solution here anyways, and he is bang on.

Diy

The reason to tell someone to hire a plumber in a DIY site is to keep them from making an ass of themselves when the result is a disaster. DIY'ers often think that any one can become a plumber if they can fasten two pipes together. In this case, there are several different ways to accomplish the task, NONE of them include a double "Y". To be precise and be plumbing code compliant, the existing installation is WRONG. A plumber, AND/OR an inspector, would NEVER permit the toilet disharge to flow past the shower connection, UNLESS the shower had its own independent vent, which this one does not have.