Problem under island sink

[jar546]

Island sink with loop vent (no cleanouts) but here is the problem.

There is a very large, heavy duty garbage disposal that serves 1 side of a double bowl sink. Due to the fact that it connects to a tee, whenever it is used, most of the time is pushes waste up into the other sink. One issue is the size of the trap. There is a 2" line there so that can help. The biggest problem is the fact that the waste is not directed in the direction of flow but rather at a 90 deg where it hit the pipe and spreads in both direction. Does anyone have a photo of a better setup where the connection before the trap is in the direction of flow?

 

[mark handler]

IMHO, The biggest problem is air behind water. Install a seperate trap, for the GD, lower.

 

[Francis Vineyard]

Will this work for you?

http://www.polaris.net/palmk/GDplumbing.html

Francis

 

[jar546]

Much better, nice find. This is on a new construction where I am NOT doing code enforcement. I am a private inspector for this one and trying to give them some options. Thanks

 

[Francis Vineyard]

I wonder if the 45 elbow idea will work for shower tubs and washer boxes too!

 

[codeworks]

what about installing an air admittance valve or "gidding" as i learned them to be, to provide more equal pressure in the system. cut it in and bring it up above the counter top like it used to

 

[gbhammer]

Must say that disposer trap is a great idea. My plumbing supervisor says that the only problem he sees with the disposer trap idea is; that a lot of plumbers have problems with one trap much less two..