Can the kitchen drain vent be installed inside the cabinet?

12/31/2013 at 11:01:37 AM

Hi Alexis:

It is possible to install the (wet vent) inside cabinet although I wouldn't recommend it, in a future the valve could fail an you'll have a nasty odour in your kitchen for some time. Also is not good for resale value.

What I would do is to take the vent all the way up through the roof, or out through an exterior wall.

Thanks

Carlos

1/2/2014 at 9:50:28 AM

Hi Carlos,

Please see the pics of what it is in there and what I want to do.

Let me know if is it possible.

1/2/2014 at 9:51:04 AM

Just a picture.

1/2/2014 at 3:48:48 PM

Ye,s you can do it as you propose in the second diagram. just make sure the entire pipe under the floor is sloped 1/4" per foot towards the drain stack.

Also if you have the room, install a Y fitting under the floor instead of a T fitting, you'll get better flow that way.

1/3/2014 at 8:26:57 AM

Thanks guys for you help.

12/12/2014 at 12:40:10 PM

Hi Alexis,

Unfortunately it's against code to run the drain/vent like the second drawing. The maximum allowable drop in drainage after the trap is one pipe diameter before connecting back into the vent. If the drop is over one pipe diameter the trap seal can be siphoned out.

I've attached a couple of pictures. The first one showing the second drawing piping configuration, which is against code. The second one explaining the one pipe diameter drop rule.

I hope this helps.

Patrick