Hi,
I am remodeling my kitchen and have come across a vent loop.
I have never dealt with these before.
I am removing the bar top from the counter so I will need to drop the vent loop by 7.5inches.
Will that cause any issues?





Edited 2 times.

the vent must be run as high as possible under the counter. if you lower the counter, keep the vent up as high as possible and you'll be OK.

Thanks. If you look at my picture, it the loop will start around the area where the black tape is currently located. So the loop isnt very high but just wanted to double check.

The black tape will be too low. Unless you have a very low sink counter top, the top of the loop should be able to be at least 36" above the floor.

How is that possible. Standard cabinet height is 34.5 minus the top plate in the wall and that leaves me around 32.5.
I find it hard believe this is not a common issue.
How do I fix?

the 'island sink' loop vent MUST be run as high as possible

island sinks are problematic at best

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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638

HELLO, REMOVE ALL OF THE LOOP VENT, NOT INSTALLED AS PER CODE ANYWAY, AS INDICATED IN ONE POST A ISLAND FIXTURE VENT CAN BE USED IF INSTALL CORRECTLY, NOT AN EASY JOB; REMOVE ALL VENT PIPING AND INSTALL AN AIR ADMITTANCE VALVE, IT CAN BE INSTALL 4" ABOVE TRAP, IT SHOULD WORK FOR THIS SITUATION,

If you are going to bring the counter surface lower, yet still wish to keep the loop vent higher, perhaps the compromise is to cut your new counter a rectangular hole to let the vent loop stickS out.

Then build a finished plywood box to enclosed the loop vent. Relocate your electrical receptables from below the counter which tends to bump heads, knees and a potential trip hazard, to receptacles recessed mounted on the vertical faces of that box, regular receptacles, USB receptacles on opposite sides, that would make the box look like it was designed to stick out for that purpose, just a thought.

AAV, while code compliant, is not best practice.

Failure is not if, but when.

Loop vent:



loop as high as possible

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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638

quote; "HELLO, REMOVE ALL OF THE LOOP VENT, NOT INSTALLED AS PER CODE ANYWAY,..."

HOW DO YOU KNOW SINCE WE DO NOT HAVE A PICTURE OF THE UNDERFLOOR PIPING? And why are you shouting. Is it because you follow the advice of the circuit preacher who believe that if you have a weak point you have to tell it loudly to convince people? An AAV is NEVER a "good" substitute for a proper atmospheric vent.



Edited 1 times.

.......aaaaaaaaaaah

'good practice' versus 'code minimum'



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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638

I can't tell how old this post is, but I am having the same issue. Were you able to resolve?