Contemplating adding a basement wet bar and considering taping the sink drain into existing 3" vent stacked that is approximately 8 feet away. Question pertains to venting, will this require it and if so can I use AAV here in Cleveland OH. I've read that AAV needs installed above a flood line, is this available in the basement below ground level?
Websites and code manuals.
I would not recommend an auto vent, as they are a mechanical device that can fail. What the instructions are referring to about the flood line is the rim of the sink that the unit serves. What I would recommend is doing a "vent loop". Run the drain line as normal to the sink. Then run a second line as high as you can in the cabinetry, back to the stack, then tie it in as high as you can on the stack.
I'm sorry, I'm not seeing your response
Would you happen to have a diagram of what your referring too, I'd imagine my case is pretty common? I"ve already cut into the base of the stack and added a wye back to where I want to place my sink, I'm working with open walls and have access to the stack as high as 9 feet.
There it can through
Give me a second and I'll find you a diagram
you are the man!!!
do you receive videos' taken from a phone somehow??
I meant can you receive
not videos, no
The difference here is that they ran the line under the floor, you can run it in the cabinet, same idea
my drain is coming out of the wall right at the sink drain point
One thing to make sure of, is when you tie the vent back in, point the Y downward with the flow of water, so that nothing coming down the stack can get in to the vent line.
so as opposed to the loop, mine would be more like half a C
the height of your drain doesn't affect the idea of how this works. Just make sure the vent runs back above the drain
so back behind the wall where the drain line comes out, I can take and add an upside down T, go high up the wall and cut back into the stack (higher than the drain) using an Y, making sure the downflow of waste from above can't come down it
use 2" line if you can
I read that, that the vent should be wider diameter than the drain? can you breifly explain the purpose of the vent
does the vent line need to be angled (1/4 per foot) or anything like the drain line?
The vent does not need to be larger. The purpose of the vent is to prevent an "air lock" in the line. As water flows through the line, it pushes air in front of it and pulls air behind it. The vent allows for the free movement of that air so that pressure does not build in front, and a vaccume is not created behind.
In this case yes the vent needs to have fall so that any condensation will drain out.
like I said, the stack is about 8 feet away, id imagine the fall could go either way, towards the stack or drain, but preferable the stack?
no have it fall back to the drain
Make sure you tie the vent in as high as you can, and NOT lower than the rim of the sink
that shouldn't be a problem...
what issue would that cause
you can get a situation that in the case of a back up of the sink, it would clog the vent line.
is there a required distance from where the drain comes out of the wall to were I can place the T
as close as you can get, but at least within 2 feet
does it need to be within 2 feet of the trap?
ok, I should be good, almost done
ummmmm, the purpose of the 2" suggestion
by code, when you are using an island vent, you must increase the drain size by one pipe diameter
my drain size is 1.5 inches
If you can, cut you T out and install a 2" line. If you can't, the 1.5" will work, but you may encounter gugling every once in a while
my vent is going to be very long, not inside a cabinet, T from within two feet of the trap, up the wall about 4 feet, then 8 feet over to the stack again, is this doable?
Yep 1.5" for the vent is fine
I"ll be able to do 2"
one last thing, there is a 90 degree bend in both the drain line and vent line, is this a problem???
How would a home inspector know all this being behind the walls???
If you are having it inspected, they will inspect before the drywall goes up. If you are not having it inspected, but may have an inspector there at some point in the future, he will be able to see how the vent is tied back in, and will be able to tell it was done as a correctly installed asland vent, based on pipe locations
??? my drain line is 22 inches high, this is all he'd be able to see
but he will be able to see where you tie the vent back in the cabinet, correct?
no, like I said, I would do the T in the wall and go back to the top of the stack
that's what I thought
will he be able to see the stack?
No, behind drywall
good thing I asked
well than he won't be able to see the vent. But you can at least sound knowledgable if asked
are you having is inspected?
so your suggestion is to come out of the line under the cabinet and go back into the wall as high as possible
OK, sound's like a plan
thanks, happy 4th...
Over 20 years experience. Third generation