kitchen sink vent

[mbabymilan]

I need help, My kichen is insanity. We have a large room but everything is so spread out and there is no real design. In order for my problem to be solved I need the sink moved. My husband hasn't started on the project because he is having trouble trying to figure out how to vent the sink if it is moved across the room in front of a window. We have a chimney in the kitchen that the vent could be run through about 3 feet from where the center of sink would be. I would be grateful for advice on getting this project underway.

RIght now the sink is vented through an inner wall. It shares that wall with a bathroom and we do have a basement underneath the kitchen. :?

Kandy

[homebild]

You can't run a vent up a chimney but you can through a side wall.

But the vent termination must be at least least 2 feet above the top of the window and at least 4 feet below any windows, doors, or intake openings that may be above it.

One approach would be to run the vent to the side of the window, then up inside the walls and out through the wall.

[househelper]

Is there an accessible attic above? Would it be possible to route the vent along under the window, then up the wall to the attic to tie in to the existing? If structurally impossible to vent traditionally, a loop vent or Studor vent is an option (what you would do if placing the sink in an island or peninsula).

[pushkins]

You can add a vent under the kitchen sink. It must be the newer style with the one way draw valve.
This is code where I am.

[CR500]

Air admittence valves aren't allowed by code here in Montgomery County, MD.

[househelper]

Use of the air admittance valves varies amongst jurisdictions, that's why I mentioned vent loop OR air (Studor) valve.

[finnegan]

With regard to Maryland and air admittance valves...I am in NJ which is the only other state besides Maryland (I believe) which uses the National Standard Plumbing Code which in turn does not permit AAVs. However, I understand that the 2005 supplement permits AAVs as per Appendix E. AAVs are treated as engineered assemblies and require an engineer's stamp. So, as I understand it, we are permitted to use an AAV if we get an engineer to sign off on it. I am going to give this a shot in a few weeks, so I will let you know how it goes.

[finnegan]

I just spoke with my local inspector who only knew that the National Standard Plumbing Code did not permit Air Admittance Valves. He had never heard of Appendix E and was not very receptive to the idea.