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Old 03-18-2016, 02:16 PM   #1
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Laundry tub drain height, too high?


Hi, I am trying to plan out how to add a drain for a washer and laundry tub (sink). However, since the run off 4" pipe is a little off the ground the rough in for the sink is coming at around 24.5", so roughly 25" when accounting for the pitch. Is this doable? Maybe lift the sink up off the ground heigher? Thanks!

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Old 03-18-2016, 03:50 PM   #2
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Re: Laundry tub drain height, too high?


raise the sink..no problem
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Old 03-18-2016, 07:48 PM   #3
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Re: Laundry tub drain height, too high?


An AAV may not work well for a washing machine drain----because the washer discharges at a high volume.

Here that would not meet code--but might in your area---
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Old 03-18-2016, 08:04 PM   #4
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Old 03-18-2016, 08:43 PM   #5
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Re: Laundry tub drain height, too high?


Can you post a photo? It would be helpful to understand your options.
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Old 03-18-2016, 08:51 PM   #6
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Re: Laundry tub drain height, too high?


Quote:
Originally Posted by asat View Post
Hi, I am trying to plan out how to add a drain for a washer and laundry tub (sink). However, since the run off 4" pipe is a little off the ground the rough in for the sink is coming at around 24.5", so roughly 25" when accounting for the pitch. Is this doable? Maybe lift the sink up off the ground heigher? Thanks!

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how high is the house trap or sewer pipe going out the wall?
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Old 03-18-2016, 09:23 PM   #7
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Re: Laundry tub drain height, too high?


Just build a platform for the Laundry tray or get a wall hung model. An AAV would get you turned down here.
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Old 03-18-2016, 10:04 PM   #8
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Re: Laundry tub drain height, too high?


Quote:
Originally Posted by oh'mike View Post
An AAV may not work well for a washing machine drain----because the washer discharges at a high volume.

Here that would not meet code--but might in your area---
From what i was able to get from product info:
http://www.oatey.com/doc/aavtrifoldlcs420c101812lr.pdf
20 DFUs is no way not enough for a washing machine(3 DFUs).
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Old 03-18-2016, 10:06 PM   #9
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Re: Laundry tub drain height, too high?


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how high is the house trap or sewer pipe going out the wall?
I don't know, the 4" CI pipe just goes under the basement. I dont really see the house trap. 4" just covers 2 walls and then goes under at the end of 2nd wall.
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Old 03-18-2016, 10:09 PM   #10
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Re: Laundry tub drain height, too high?


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Just build a platform for the Laundry tray or get a wall hung model. An AAV would get you turned down here.
Agreed. I am not fond of using AAV but proper venting isn't an option. Previous owners just used a laundry sink that was not vented and with an S trap.
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Old 03-19-2016, 05:31 AM   #11
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Re: Laundry tub drain height, too high?


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I don't know, the 4" CI pipe just goes under the basement. I dont really see the house trap. 4" just covers 2 walls and then goes under at the end of 2nd wall.
if the sewer main goes under the floor, there is no reason to be able to lower the whole main to rough in the sink at proper height..
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