Moving kitchen sink


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Old 03-16-17, 10:04 AM
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Moving kitchen sink

I am soon to be starting our kitchen remodel and our plan is to center our kitchen sink under the window. The plumbing currently comes from under the slab with no access to it, so my plan right now was to run to through the wall. When looking at the current set up the P trap connects to the wall drain where it also has a clean out at the bottom of the cabinet. I was thinking of keeping the clean out and putting an elbow about that going through the wall the additional 8-10 inches keeping a 1/4 rise in the pipe. There will be a small cabinet install where the clean out is now and the new sink base will be right next to that.
I cant find a vent in the piping and wasn't sure if i needed to worry about adding another vent since its not moving much.
Is this a valid way to move the sink, or to be up to code is it require to dig up the foundation ?

Thanks !
 
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Old 03-16-17, 10:21 AM
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How far are you moving the sink from its current location?

Can you leave the drain where it is, and just run it through the back (or bottom) of the cabinets until you get to your new sink? P-trap and vent it there?

- Can you install a new vent up through the roof (best case)
- What kind of pipe is it? PVC is good. If it's galvanized, you may want to consider digging and replacing anyway due to its age and possible leaking/clogging.
 
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Old 03-16-17, 10:32 AM
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Welcome.

Your plan is valid. I would go to the right through the wall and come out into the sink base cabinet with a 45 elbow pointed towards the garbage disposal.

If there's a window the pipe needs to go inside the cabinets. Boring of a tripled up stud is not allowed.
 
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Old 03-16-17, 12:02 PM
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This sink is moving 8 inches to 12 inches (measured from center). Reason for the difference is i want to keep the plumbing mostly on one side if possible. I want to add a slid out tray for trash later that will go under the sink.

To leave it in its current place i would have to do a lot of cutting into the cabinets which i don't want to and would rather do a little extra work on it now than regret it later .

There is no vent going to the roof that i have seen, so i am a little confused as to where its currently at. Is that part of code that all waste lines have a vent ? Or does the P trap take place of the vent since that will block any gases coming back up through the drain ?

Thanks for the responses, very much appreciated.
 
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Old 03-16-17, 12:18 PM
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There has to be a vent. There are locally used devices called AAV (air admittance valves) which allow air in right above the sink. They are only approved in certain applications.

Have you gone outside and looked at the roof above that area for a vent pipe ?
Since you have a slab it usually goes up the nearest wall.
 
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Old 03-17-17, 06:32 AM
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PJmax, you are correct there is a vent, once i went out side i could see it on the roof. I cant tell exactly where or how it connects yet until i remove the sheet rock but it is there.

Thanks !
 
 

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