island loop vent

Hi everyone, First off, thanks for the great site. Definitely a newbie here so I apologize in advance if I put this in the wrong place or have my formatting wrong. My general questions are: Would this be up to code [UPC] (or at least pretty close) and are there any functional differences...

I’m in the middle of remodeling a house we just purchased. I have attached a photo of the “loop vent” below for our kitchen sink. The would be sink and p-trap are on the opposite side. It appears that the vent and drain dive into the same pipe as it goes into the ground (I am on slab). Sink...

Does an island loop vent have to come to a point (45-90-45 bends), or can the top run horizontally for a few feet using two 90 bends and no 45s? I would like to run my island sink drain pipe down one leg of the island and the vent pipe down the adjacent island leg a few feet away. Thoughts...

Plumber installed an island loop with this setup. He says it was done this way because connecting the vent back to the drain would cause more damage to the slab (this is a reno and we had to cut about a foot deep into the slab to make this happen). What problems am I looking at down the road?

I had an island loop installed with my kitchen reno. I opened the vent side cleanout and water poured out. Then there was standing water up to level of the cleanout. So the vent side of the loop isn’t draining. The drain side is draining though. This shouldn’t be possible if the loop was done...

Hey everyone, Hope you guys here can help because I don't have faith in my contractors plumbing skills. He's tried to use sanitary tees horizontal, told me to vent out the bottom of the outside wall for a kitchen island sink, never heard of a island loop ven, and handful of other other things...

Looking for some help in understanding what I've done wrong and why this loop vent doesn't work. The vent side slopes towards the loop, the drain slopes away. A p-trap is above the floor on the drain side, and the vent side connects to the drain side as high as possible under a counter top...

Doing a reno which includes a sink in the island. I haven't decided if it will be a clean-up for prep sink. The kitchen designer and the cabinet designer both are the designing the island cabinet assuming that the vent will be inside the sink base cabinet. Both of them have been doing this...

First I would like to thank Terry and this forum for the many posts on island loop vents. My familiarity with them, all from what I learned here, impressed my city inspector for a DIY'er. Before I complete final glue up of my peninsula loop vent, I would like input on heights of the cleanout...

Hello Everyone, There are plenty of diagrams out there showing island loop vent configurations but I am still not sure how I should go about my set-up. All of the diagrams I find show the drain pipe returning towards the same side as where the roof vent pipe originates. This has the vent loop...