Plumbing question with our residential basement remodel


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Old 04-27-18, 02:27 PM
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Plumbing question with our residential basement remodel

My plumber says the height of the drain from the kitchen above is correct.

Maybe Iím over-thinking the height but I think it should be 12″ from the floor not 32″ as shown in the picture on the left hand side.

My concern the bathroom sink drain is below the kitchen drain. Is he right?

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Last edited by PJmax; 04-27-18 at 04:34 PM. Reason: enlarged picture to board max
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Old 04-27-18, 02:53 PM
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Plumbers get paid big bucks and know the plumbing codes. (Like P3107.3)

A 2" pipe can handle 6 drain fixture units. From what I see, you currently have 3 DFU... half of the maximum. Where each drain enters is not a issue. It could be above or it could be below. Doesn't really matter. Code says the fixture above your bathroom sink can be no more than 4 DFU... you have 2... half of the maximum. Nothing to worry about.

18" is the standard rough in height for a sink. Only reason it would be different is if you will have some special vanity, like maybe one that is on legs and has a shelf that would interfere.
 
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Old 04-27-18, 04:40 PM
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I'm not a plumber but I agree on the kitchen sink connection. I was under the impression that with a connection like that the kitchen sink could siphon the water out of the bathroom trap.

I would have liked to have seen two 45's instead of that 90 on the kitchen drain line.
That 90 could be tough to get a snake thru.
 
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Old 04-27-18, 04:51 PM
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If anyone would like to reference P3107.3.... here is the link.

https://codes.iccsafe.org/public/doc...apter-31-vents
 
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Old 04-27-18, 06:41 PM
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I agree, the kitchen above should tie in under the bathroom sink. Where it's tied in now, it's technically a wet vent, which isn't allowed.
 
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Old 04-27-18, 06:47 PM
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P3108.4 - when Vertical wet vent is permitted. (Same link as above.)
 
 

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