Gurgling Kitchen and Island Sinks and Strange Plumbing?

[Geewiz]

There's always been some occasional gurgling from our kitchen and island sinks. Lately it's become constant, and the sinks are slow to drain. Though we built the house 20 years ago, I never thought much about how the sinks were plumbed...until now.

From what I've read and researched, the current island plumbing isn't close to being effective, let alone close to code?

Here's the current configuration...


I'm wondering if the following would serve as an effective solution...


We're getting ready to sell the home, and I don't want any flags raised!

Thank you
for any help/advice!

 

[frodo]

yes, the aav would solve the problem
as it is, the island sinks vent is being cut off because a wye was used instead of a tee

 

[Geewiz]

Thank you so much for the quick (and comforting) response!

The photo shows where the island sink drain pipe drops through the floor and meets the main drain pipe. The wye connector enters the main pipe on the side. Would this also contribute to the drain problem? Should the wye be oriented to enter the main pipe from the top? (There's not a lot of room to play with here.)

 

[Geewiz]

A

Thank you so much for the quick (and comforting) response!

The photo shows where the island sink drain pipe drops through the floor and meets the main drain pipe. The wye connector enters the main pipe on the side. Would this also contribute to the drain problem? Should the wye be oriented to enter the main pipe from the top? (There's not a lot of room to play with here.)

View attachment 20791

And while I'm at it.. should there be a cleanout on the pipe above, under the cabinet?

 

[frodo]

had to tell from a 2 d picture, but it looks to me like that drain line does not have much fall on it

can you verify slope with a level

 

[Geewiz]

There seems to be more slope than meets the eye? Maybe I'm obsessing too much!

 

[frodo]

not there.

 

[Geewiz]

not there.

View attachment 20793

Yes...the closeup is the section of pipe going into the wye connector at the drainpipe. I agree, it looks flat but the level is pressed against the bottom, and the bubble is at the high end, close to where the pipe comes down from the sink.

 

[frodo]

ok...it is hard to tell in a picture.

on the island sink yep..a co is always a good thing to have installed

 

[Geewiz]

Thank you so much! I'm on my way!