Does this toilet need a separate vent?

[Mothra]

Would this toilet need a separate vent or would it be ok from the already vented system? The utilities on the shared wall fall into a 2” drain and then transitions to a 3” at the turn. All vents are 2” up. The sink on the toilet run is roughly 6’ away. Thank you for your insight

 

[Terry]

You have a washer upstream, yes the toilet will need a vent before entering that line.

 

[Sponsor]

 

[Mothra]

Thank you!

 

[Plumber69]

or tie your washer machine last

 

[Mothra]

If there wasn’t a washer upstream, it would be ok?

Sorry, just saw reply above

 

[Mothra]

Question, looking at how to vent the toilet, can I use the attached fixture picture to vent the toilet at the vertical to horizontal sweep before entering the line?

 

[Mothra]

Which scenario would be better, using the sweep fixture with a side hole to vent or using a santee on its back and rolling a wye to connect to the main drain line?

 

[Mothra]

Would either work? Neither? Open to ideas

 

[wwhitney]

As far as I know, there are 3 places along the run you can take off the toilet vent:

1) The vertical portion directly below the toilet flange. For this, use a wye.
2) The horizontal portion (fixture arm) after the closet bend. For this, use a wye with the branch rolled up by at least 45 degrees from horizontal.
3) At the point where the fixture arm turns down, with a sanitary tee, or with an elbow with low heel inlet, where the inlet points straight up.

In all cases, any fittings in the vent below the flood rim level of the toilet need to be of a drainage pattern. So, for example, if in (1) or (2) you use a 45 to go horizontal below the flood rim of the toilet, and then use a 90 to go up into a wall space, it needs to be a long turn 90.

If there are other options I'm unaware of, hopefully someone with more experience will chime in.

Cheers, Wayne

 

[Michael Young]

You have a washer upstream, yes the toilet will need a vent before entering that line.

Would either work? Neither? Open to ideas

just use a heel inlet 90 and pull your vent up the wall behind the toilet

 

[Mothra]

As long as I keep my 1/4”/ft grade, does rolling a wye to enter the main line cause any issues? Or is it preferred to use a long sweep combo?

 

[Michael Young]

As long as I keep my 1/4”/ft grade, does rolling a wye to enter the main line cause any issues? Or should is it preferred to use a long sweep?

no problem at all if you want to roll your combination