Vent problem with pic

[zerolast]

Pulled out shower and tub. The original vent came up at a 45 degree angle at the main T joint where the shower (right) and tub (left) split off. I want to install a larger shower so I laid the T joint flat and wanted to see if this is ok for venting the pipe (top)...it is almost horizontal.

Any advice is appreciated.

 

[Sjsmithjr]

If I'm looking at your photo correctly, the double sanitary tee is installed on the horizontal. That is not OK. There are other issues as well with the layout. A good place to start would be a basic guide like Bert Polk's. Check it out and maybe post a sketch of what you propose to do. Could save you a lot of headaches and wasted materials.

Helpful Plumbing Hints for Residential Construction by Bert Polk Plumbing Inspector Lincoln County

 

[Sponsor]

 

[WJcandee]

You can, as a broad sweeping generalization, flat-vent a shower and tub where the conditions make a vertical vent impossible, but not how you have done it. Do what Sjsmithjr suggests. And remember that just because it all connects together doesn't mean it's going to work. As a practical matter, ask yourself: where is the water from each thing going to run and how are the fittings that I am using going to direct the water and to where, and how am I providing air reliably to keep the traps from siphoning, and how am I keeping stuff from clogging the vent system? You're going to get closer to Code as you think about these things that way. For example, that's why the code isn't going to permit that San-T to be used like that.

 

[zerolast]

Thanks for the advice! It did not seem logical after I dry fit it. Thanks again.

 

[zerolast]

If I'm reading the vent guide correctly, I can have a flat T where the shower and tub offshoot and then have a flat-"ish" vent pipe between the T and the shower trap? Would I need a vent for the tub as well? TIA.

 

[Terry]

I would use two wyes or at least a double wye fitting.
I like two wyes because I can give them the tilt for grade.

The lav will wet vent if it's run with 2".
It should have a long turn 90 where it goes up the wall, and a cleanout.

 

[zerolast]

I would use two wyes or at least a double wye fitting.
I like two wyes because I can give them the tilt for grade.

The lav will wet vent if it's run with 2".
It should have a long turn 90 where it goes up the wall, and a cleanout.

Please see my crude drawing...will that work? Hopefully I'm following your advice correctly.

Thanks in advance!

 

[Sjsmithjr]

Any reason you can't take take a more direct route with the tub drain?

 

[zerolast]

It is a retrofit...would like to use the same holes that are already drilled.