Help with wet vent with toilet and shower!

[Oswald Tay]

Yes.

To clarify, the trap arm (from trap outlet to vent connection) needs to be sloped at least 1/4" per foot, but also may fall no more than one pipe diameter. That's to avoid the possibility of siphoning the trap. So you could slope the trap arm at more than 1/4" per foot, but that reduces how far you can go before hitting the one pipe diameter drop limit.

Cheers, Wayne

Ok, and are there any restrictions as to how long the wet vent can be?
I'll need to bring it through the wall for about 4 feet, then down into the floor to connect to the shower drain with a wye fitting.
Is it ok to have sharp turns in the wet vent or anything like that?

 

[wwhitney]

No length limit on the wet vent. The wet vent is a drain, so normal drain rules apply: LT for all 90s, except when turning from horizontal to go vertical (down), where a quarter bend is allowed.

Cheers, Wayne

 

[Sponsor]

 

[Oswald Tay]

No length limit on the wet vent. The wet vent is a drain, so normal drain rules apply: LT for all 90s, except when turning from horizontal to go vertical (down), where a quarter bend is allowed.

Cheers, Wayne

Ok, thanks!
Sorry, I'm not exactly sure what LT means...

 

[Oswald Tay]

Also, do the rules in this picture below apply?

 

[wwhitney]

I agree with everything except possibly the lower left diagram I think that's subject to some debate, as there is also vertical wet venting. But typically where the wet vent has a horizontal component, it's no trouble to make all the vent connection as in the lower right, so you can avoid the diagram in the lower left.

Cheers, Wayne

 

[Oswald Tay]

No length limit on the wet vent. The wet vent is a drain, so normal drain rules apply: LT for all 90s, except when turning from horizontal to go vertical (down), where a quarter bend is allowed.

Cheers, Wayne

Thank you!
Would you say this general map of the turning in the wet vent is acceptable?
Also, what are the sloping requirements, and turning requirements for the dry vent part?