Laundry Drain smell issue

[Diehard]

It doesn't appear that the 2" washer drain line is excessively sloped but I must ask anyway.
How much slope and/or drop from the trap to the vent? It has been assumed that it's to code but if it was too steep, like say 1/2" per foot, it would block the venting of the trap.
Like I said just has to be eliminated as a possible cause.

 

[JonnySee7]

Thanks for all the help everyone...I think I will try the AAV to see if that works. The weird thing is i dont get any smell from the Laundry sink drain...

Frodo...i like the idea of the slow drip trap primer, lol

 

[CT18]

Just put in a AAV instead of running back to the stack. That is not a vent if it is picking up fixtures above. You would have to run your line above the flood level of the highest fixture to be a vent.

 

[frodo]

For ipc he looks good. 6’ arm , Wet vent is our way of venting. If it works for 1 code then it works. This smell is from washer not lavatory. Lavatory isn’t getting dry?

you can not use a waste stack for a vent
you can not wet vent on a waste stack
the lav has no vent
he has 180 degrees in offsets with a clean out, at the offset

 

[Jamesplumbing06]

Our strictest inspectors pass it everyday. Long as the 3” waste stack continues out to atmosphere then it’s a wet stackable vent. It’s a text book arm over. Ipc. I just passed the test in February and aced the venting section. It’s drawn like that. Can’t stack 2” vent but 3” main going into atmosphere. We can’t install a dry vent. It’s not allowed here.

 

[Jamesplumbing06]

Refer you to ipc code book section912.2-915.1

 

[CT18]

Your right it can be used as a vent for fixtures as long as your in the developed length. That cant be used as a fixture vent though.

 

[wood4d]

there is a wye at the top of the photo. There has to be fixtures above this stuff.

 

[CT18]

Then it cant be used as a vent for a fixture.

 

[frodo]

Then it cant be used as a vent for a fixture.

from post #16
Thanks for the replies. The smell is coming from laundry drain. No smell coming from the sink. There is other fixtures tied into the stack above where the vent in the basement is tied into.

also what is being missed is a wet vent can only be on the same floor,

 

[CT18]

yeah like a vented lav can be a vent for a toilet or shower/tub.

 

[frodo]

yeah like a vented lav can be a vent for a toilet or shower/tub.

yes sir, but you can not tie in a lav to the waste stack for an upstairs bathroom. unless.....it has a separate vent

 

[CT18]

View media item 664View media item 663I cant draw as good as Frodo