Vent question

I posted this pic before, but forgot to ask the following:

I will be removing the toilet flange and drain in the center of the image and moving it to the right branch where none exists currently.

If I put a 3" double wye coming off of the 3" you see in the bottom of the image and branch off to the left with a reducer to the shower trap and branch off to the right going to the toilet flange, my question is: from the 3" double wye that will be at the bottom of the screen, down the center, can I connect a 3"X2" wye or reduce down to a 2" waste-T and angle the 2" inlet up, connect a 45 or 90 elbow and run that up the wall as my vent?

So "up the middle" it would look like 3" double wye to 3"X2" wye with the 2" side up to vent and then I would plug the other side of the wye. The vent piping would replace the location of the current toilet flange, so to speak.

Would this be a legitimate vent or would this vent be broken?

I ask because this would save me from having to cut more concrete in order to accommodate a vent coming off of the right side for the toilet.

Thank you..........idoc

I know it was my suggestion, but you really should use 2 individual wyes instead of a double wye, or as Terry stated, you wont be able to turn them up to grade the drain...

please explain

dlarrivee,

I'm not clear as to where you mean I should attach the individual wyes?

Thanks...........idoc

My guess is something like this;

The last picture would seem to be the better option. Now all you have to do is run 2 vents. One for the toilet and one for the shower.

drain

quote; you won't be able to turn them up to grade the drain...

That would be partially true if he were working with threaded fittings, (and even then we compensated by cutting "crooked threads"). But PVC and ABS hubs have so much leeway that there is absolutely no problem flexing the joint, before it hardens, to provide any necessary pitch.

hj said:

quote; you won't be able to turn them up to grade the drain...

That would be partially true if he were working with threaded fittings, (and even then we compensated by cutting "crooked threads"). But PVC and ABS hubs have so much leeway that there is absolutely no problem flexing the joint, before it hardens, to provide any necessary pitch.

Click to expand...

I was just repeating what Terry had said in the other thread.

It was my original suggestion to use a double wye and use the straight through as a cleanout as well.

Fewer fittings is probably better.

hj said:

That would be partially true if he were working with threaded fittings, (and even then we compensated by cutting "crooked threads"). But PVC and ABS hubs have so much leeway that there is absolutely no problem flexing the joint, before it hardens, to provide any necessary pitch.

Click to expand...

I 100% agree....

export! said:

My guess is something like this;

Click to expand...

Where is the vent for this system? Is it wet vented through the bathroom lav?