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 Kitchen Sink Vent for under a window
Author: Anonymous User

Trying to install a new kitchen sink as part of a remodel. As I get ready to rough in the vent I realize that I can't vent straight up because the window is there. So go horizontal until I get out from under the window seems right, but that means drilling or cutting into weight baring studs. Is this ok or is there another solution. There are three studs nailed to gather as part of the window framing/header and I would be cutting or drilling through these three only.

Thanks to all the pros out there.

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 Re: Kitchen Sink Vent for under a window
Author: North Carolina Plumber (NC)

I would use 1 1/2" pipe for the horizontal run and bore through the studs.

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 Re: Kitchen Sink Vent for under a window
Author: Anonymous User

Just remember the max size hole you can drill in these studs is 2" (diameter) and it cannot be any closer than 5/8" to the edge.

These rules are pretty much standard for doubled load bearing studs, but you might want to check your area to make sure they follow them.

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 Re: Kitchen Sink Vent for under a window
Author: hj (AZ)

It is done all the time. Just cut the proper sized hole and center it on the studs.

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 Re: Kitchen Sink Vent for under a window
Author: jjbex (IL)

If it drilling thru load bearing cripples or studs scares ya, install strongties vertically on 'em.

Cheerrs, Jeff.

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 Re: Kitchen Sink Vent for under a window
Author: royboy (SC)

At the risk of getting things thrown at me by all you DWV plumbers, how about a 2" pipe down through the floor and a Studor vent?



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 Re: Kitchen Sink Vent for under a window
Author: packy (MA)

royboy.. that's cheating! most inspectors wouldn't let that fly because running a vent up next to the window is not that difficult. i must say that i've ruined many 2 1/8" bits by drilling thru that triple stud next to a window. carpenters seem to know just what height we need to run the trap arm at and manage to fill that spot with 16 penny nails.

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 Re: Kitchen Sink Vent for under a window
Author: royboy (SC)

I knew that anyone over the age of 50 would jump on that idea with both feet! I've invested in carbide tip hole saws just because of those #@&*%# nails. Some times the window is high enough to put the tee back of the sink and run the vent just under the window framing to maintain the 6" rule. I just hate a dirty arm on a kitchen sink.



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 Re: Kitchen Sink Vent for under a window
Author: hj (AZ)

They know everywhere you are going to drill a hole and either put a 16 penny nail or a knot there. Studor vent? What do you think he is building? A mobile home?

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 Re: Kitchen Sink Vent for under a window
Author: PlumberManDan (IA)

I'm not going to say a word EXCEPT, NO

Sorry,I can't help it, I have used "Studor" vents, maybe 10 in my lifetime, But to stick it in a wall under a cabinet totally conceled, NEVER. That was my other word.

Plumbermandan

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 Re: Kitchen Sink Vent for under a window
Author: hj (AZ)

That was my first reaction also, until I decided he meant bringing the drain through the floor of the cabinet, like was done with "S" traps, and putting the Studor inside the cabinet. Still a "Mickey Mouse" way of venting.

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 Re: Kitchen Sink Vent for under a window
Author: royboy (SC)

I agree that it is a poor substitute to a VTR, but the advantage of having a 2" drain for the kitchen sink is a plus.



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 Re: Kitchen Sink Vent for under a window
Author: hj (AZ)

Everywhere I have ever done plumbing has required a 2" pipe to the point where the sink's 1 1/2" tied into it.

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 Re: Kitchen Sink Vent for under a window
Author: royboy (SC)

This is also our code, but this allows a drain with no 1-1/2" pipe. I use a 2X1-1/2X1-1/2 tee in the verticle with a 1-1/2" male trap adaptor in the branch.



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 Re: Kitchen Sink Vent for under a window
Author: hj (AZ)

I would expect that it is the standard way for most installers to do it.

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 Re: Kitchen Sink Vent for under a window
Author: jjbex (IL)

In Exurban Chicago, it's a 2x1-1/2x2 tee. A double 2x1-1/2 wye is installed on the trim. The c/o plug is then in the middle. I have only seen 1 inspector insist on a different configuration.

Cheers, Jeff.

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 Re: Kitchen Sink Vent for under a window
Author: hj (AZ)

I have done it that way, but only if the drain is near the middle of the sink or too high for a conventional waste. Some inspectors will turn it down because it does not conform to the individual vent requirement for each trap.

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 Re: Kitchen Sink Vent for under a window
Author: Anonymous User

Im from Indianapolis in. and here we can run a combination drain and vent .
Type of fixturesthat can be served by this type of vent are,floor drain,standpipes , sinks .and lavatories
if the trap size is 1 1/2 up size it to 2 inch take it thru the bottom of the cab you have to run it to a vented 3 inch line befor tie in .
by up sizing there is room for water and air . and you can run it as far as you want depending on fall 2 inch 90 inside of cab 1 1/2 bushing 1 1/2 trap adaptor .
we cant drill criples under windows and every kitchen sink sits in the center of one every time
also the only vertical drop it can have is down thru the cab horizontal the rest vertical no more than 8 ft

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