Extending Sewer Line for Toilet - Plumbing Configuration

[Gregj107]

I am moving the toilet in my bathroom to an opposite wall and will need to extend the 3" sewer line about 9ft. The original toilet is at the end of the sewer line which will be removed. I would then use a 90 degree long sweep to connect the two sewer lines. I am using the UPC code.

In the diagram below does the plumbing look correct for the toilet? Also does the 2" vent line for the toilet need to go straight up to the attic or can it have a 90 degree in it? I do have a 1.5" vanity vent line about five feet from the toilet, wondering if I could change it to a 2" and have the toilet vent line connect into it instead running a separate vent line?

I appreciate the help as don't have any plumber close to where I live.

 

[Reach4]

In the diagram below does the plumbing look correct for the toilet?

I think you shrank the image too much.

 

[Sponsor]

 

[Terry]

The vanity if run with 2" could wet vent the toilet.
Also the two vents can combine at 42" or higher.

Vertical to horizontal should be wyes and combo fittings.

 

[Gregj107]

Should the sanitary T in the picture for the vent pipe also be a wye combo? Last are these pictures of a combo and a wye/combo? Thank you

 

[wwhitney]

A WC is the rare fixture where the vent takeoff could be a combo in that orientation. But a sanitary tee is fine and a combo has no advantage.

For any non-siphoning trapped fixture, for a vent takeoff while the drain turns down, a sanitary tee is mandatory and a combo is prohibited.

Cheers, Wayne

 

[Terry]

A toilet can go horizontally into a santee or a wye fitting but not vertical into a santee on it's back. The pop spreads out both directions. It needs a fitting that directs it downstream.

 

[wwhitney]

FWIW, I interpreted the last question to be about the upper 3" san-tee where the vent comes off. As Terry says, the lower 3" san-tee in the drawing needs to be a combo.

Cheers, Wayne

 

[Gregj107]

Thank you for the help!