Understanding my Kitchen Drain Line

[senior_fold198Seven]

This is my second post to the forum, but I haven't been able to reset my password for my original account (Senor_Fold1987). Anyway, I am working on my kitchen and trying to better understand how my kitchen drain line is supposed to work. When the walls are in, it is a very pronounced stub out. Does it make sense to just eliminate the second bend at the kitchen floor level and add an AAV? Or is there a method to this setup? The drain line terminates straight below into the sewer line.

 

[wwhitney]

Yes, eliminate the extra bend. Figure out your entire kitchen sink stack up to come up with the optimal stub out height, or check some of the threads here on the topic.

Yes you absolutely need an AAV or a dry vent that connects to a vent through the roof.

Also that PVC to copper joint looks highly suspect You should cut it out and use a copper to PVC banded coupling tightened to the proper torque. If that's 2" PVC to 3" copper, use Fernco Proflex 3006-32 or Mission Rubber KC-32. If it's 1-1/2" PVC to 2" copper, the last digits change to -215. But in that case you could consider changing all the PVC to 2" up to the wall stub out, and use a. 3001-22 or CK-22

Cheers, Wayne

 

[Sponsor]

 

[Breplum]

Adding to WW's notes: Long sweep fittings are required when waste lines go from vertical to horizontal. AND kitchen sinks are required to be on 2" lines and have a cleanout.

On the water side: Holdrite for stabilizing water stubs is required:

 

[senior_fold198Seven]

These answers help me out so much. Thank you both!