Is this venting correct for a sink below a window?

[Adam McBride]

I am remodeling my home and the plumber said this how they vent an island sink, and it would work and be in code. There is a window above the sink, and they said this was the reason they chose this method. They said it was some kind of closed loop vent...ok.

1) Is it right?
2) If not, what does it violate? I am in Texas, is there some kind of code? I want to show the contractor why its wrong so he understands where Im coming from.

Thank you for your help!

 

[Reach4]

1) Is it right?

No.

2) If not, what does it violate? I am in Texas, is there some kind of code? I want to show the contractor why its wrong so he understands where Im coming from.

Trap is not vented. It is so bad that he will be ashamed to argue otherwise.

There is some kind of code in Texas, but not state-wide. Most is IPC, but some cities are UPC. What you have there is wildly wrong in both.

On second thought, it is unlikely the guy is a plumber.

 

[Sponsor]

 

[Adam McBride]

Thank you so much. Ill talk to the contractor and let him know I dont think its right and see where the conversation goes.

 

[Reach4]

If you are in IPC territory, you could use an AAV. Easy peasy.

If you are in San Antonio, Houston or Austin, that is UPC. You may need to get a variance to allow the AAV.

Your "plumber" was trying to fake a "Chicago loop".

 

[Reach4]

I found this thread. Troubling. Some kind of local thing?? Weird.
https://terrylove.com/forums/index.php?threads/proper-loop-vent.44963/

 

[Adam McBride]

Thank you so much. Originally there was a pipe that ran through the roof, something happened and the pipe broke or fell because it was sitting in the wall and the roofers just covered the hole. This was all years before I bought.

The plumber came back and ran a pipe into the attic through the same hole and put in an AAV.