Island Vent Remodel

Hi !
I was hoping to get some advice on replacing an island sink/cabinet. The original owner had a 2 basin sink with a garbage disposal on the right side. (picture A). there were 2 traps that merged together into a sanitary tee which is connected to the island vent system. I don’t recall the vent system having a sanitary tee with clean out adapter.

I’m planning on installing a single basin sink with a garbage disposal unit. I’m hoping to use the existing island vent system. I’ve been doing research on various forums but have some questions.

Does my schematic (figure B) look like it will work? What you see will all be within the kitchen cabinet. Starting from the garbage disposal ---> 1.5” trap ---> 2”x1.5”x2” sanitary tee (picture D) As you go up, there will be a 2”x2”x2” flat patterned?? sanitary tee w/ plug

1) What exactly is a flat patterned sanitary tee? is it (picture C)? I’ve read that you need a flat patterned tee if you’re going to use a garbage disposal unit but not exactly sure what it looks like. or does the flat patterned sanitary tee need to be connected to the trap??

2) I’ve seen illustrations where the sanitary tee is on the vent side (picture E). and I’ve seen illustrations where the sanitary tee is on the water flow side. (picture F). is there a correct way? or should i put a sanitary tee w/ plug on both sides?

3) I’ve also read the top of the vent loop should be at least 6” above the horizontal line

Thanks for reading! Would appreciate any feedback.

 

see if i can a bigger picture of the schematic

 

You only need a cleanout in the drain side if you can't easily snake through the sanitary tee. This is important if your p-trap is cemented in place. Most of the time, it's a slip-fitting, so if needed, the trap can be removed and snaked through that.

I don't know the code requirements for adding a cleanout in the vent portion of the loop... but I guess it wouldn't hurt if you're re-piping it anyway.

The current setup looks good. You can either seal off one branch of the wye and leave it as-is, or remove the wye. Or re-pipe it if you want

 

thanks zorfdt!

i already took out the wye so will just repipe. that makes sense about the P trap being a slip fitting but i'm still going to put a sanitary tee w/ clean out plug on the drain side.

thanks again!