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Old 03-11-2015, 03:48 PM   #1
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Kitchen sink rough in height


I am installing a new sink in my kitchen. The counter is at 36 inches, and the sink is 8 inches in depth. It is a single sink.

The drain pipe is not in the wall, it is in the cabinet itself only it is about 2 feet away from the sink location. Am I safe to run a horizontal on slope pipe from the sink to where the pipe is? There is a vent extending upwards from here through the roof.

Also I'm looking to know the proper height for the stub out on this pipe. Again it is a single sink, however there will be a dishwasher Y added so I'd like enough height on the vertical pipe to connect this as well.

Thanks!

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Old 03-11-2015, 04:06 PM   #2
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Quote:
Originally Posted by Lemkie View Post
I am installing a new sink in my kitchen. The counter is at 36 inches, and the sink is 8 inches in depth. It is a single sink.

The drain pipe is not in the wall, it is in the cabinet itself only it is about 2 feet away from the sink location. Am I safe to run a horizontal on slope pipe from the sink to where the pipe is? There is a vent extending upwards from here through the roof.

Also I'm looking to know the proper height for the stub out on this pipe. Again it is a single sink, however there will be a dishwasher Y added so I'd like enough height on the vertical pipe to connect this as well.

Thanks!

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need a picture of what you have...
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Old 03-11-2015, 04:32 PM   #3
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Don't forget to factor in a disposal if you ever intend to install one. If so, the stubout will likely need to be lower. Disposals won't pump uphill (don't ask how I know this).
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Old 03-11-2015, 05:00 PM   #4
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Quote:
Originally Posted by md2lgyk
Don't forget to factor in a disposal if you ever intend to install one. If so, the stubout will likely need to be lower. Disposals won't pump uphill (don't ask how I know this).
Thanks for the tip. There will not be a disposal though. I imagine you learned this the hard way!

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Old 03-11-2015, 05:02 PM   #5
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Quote:
Originally Posted by ben's plumbing
need a picture of what you have...
Actually I just cut out the existing plumbing, leaving the vent. So there is nothing there at the moment.

Really all it is is the hole in the floor about 2 feet to the left of where the sink will be, and the vent above this hole...

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Old 03-11-2015, 06:24 PM   #6
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Is this a single or double bowel sink? I would move the pipe in the wall and come out on the correct center for the bowel. Normal rough is 16 off the floor to center of drain. Lower is always better.

To answer the question a 2 foot extension from the vent is fine then a P trap.
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Old 03-11-2015, 06:33 PM   #7
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Quote:
Originally Posted by Ghostmaker
Is this a single or double bowel sink? I would move the pipe in the wall and come out on the correct center for the bowel. Normal rough is 16 off the floor to center of drain. Lower is always better. To answer the question a 2 foot extension from the vent is fine then a P trap.
It is a single bowl sink


Unfortunately I can't move the pipe as it runs right next to a beam on the floor under it. I can't move the sink either as it's going to be centered with a window.

Essentially what I will have is a pipe coming down off the drain, a p trap, the. 2 feet on grade horizontally to connect to the existing pipe, then it will drop down with a vent on top. Is this ok?

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Old 03-11-2015, 06:36 PM   #8
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Yes as long as your vent is straight off the top and has no horizontal bends.
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Old 03-11-2015, 06:39 PM   #9
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Quote:
Originally Posted by Ghostmaker
Yes as long as your vent is straight off the top and has no horizontal bends.
Great. The vent goes straight up through the roof with no bends.

Thanks for the quick replies!

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