Wall toilet install

[Joe Waldram]

I am trying to determine if it is possible to install wall hung toilet. The space is tight as the horizontal run is ~20ft. Is it possible to use a 1/4 bend with side inlet for vent and or wet vent? Thanks for any input

 

[John Gayewski]

I am trying to determine if it is possible to install wall hung toilet. The space is tight as the horizontal run is ~20ft. Is it possible to use a 1/4 bend with side inlet for vent and or wet vent? Thanks for any input

That can only be used on its side
Being on a toilet might be questionable.

 

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[Joe Waldram]

I think I found my answer.

Alternately, I think I have room for a wet vent as the 2" Y comes off below 45 degrees giving added space for the 1/4"/foot required.

 

[wwhitney]

That diagram does not comply with your plumbing code (UPC). Only the bottom left is correct.

Cheers, Wayne

 

[Joe Waldram]

Thanks, Wayne.
Do you or others know the proper UPC code for use of these fittings.
Thanks,
Joe

 

[wwhitney]

The low heel inlet quarter bend is basically a san-tee and can be used however a san-tee can be used. I don't think the other fittings can used under the UPC except when all connections are vents at least 6" above the flood rim level of the fixtures involved.

Perhaps a photo or diagram of what you are dealing with and why you'd like to use a fitting with that geometry would be a way for us to advise you on the alternatives.

Cheers, Wayne

 

[Joe Waldram]

Sorry for delayed response I really appreciate the feedback. I have attached a drawing of what I'm thinking .
I think a 3"x3"x2" Y used as a wet vent will fit in the joist space.
To conserve height can I use a regular 90 for the toilet drain going from vertical to horizontal?

 

[wwhitney]

While I couldn't give you a code reference as to why it's allowed, I understand it's common to use a quarter bend as a closet bend, rather than a LT90. I checked the curvature on a 3x4 reducing closet bend via the catalog drawings, and it matches the curvature of a quarter bend, not a LT90.

Cheers, Wayne

 

[Joe Waldram]

Thanks Wayne,
Does diagram look like this configuration works?

 

[wwhitney]

You can certainly wet vent a WC with a 2" lav drain and vent under the UPC. The wye has to be within 6' of the closet flange in the wall, as measured along the path of the WC drain.

Cheers, Wayne

 

[Joe Waldram]

thanks for the input
Joe