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Old 03-04-2013, 10:05 AM   #1
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Adding laundry sink - Can I "T" into washer drain?


I have an open-top drain pipe that runs down through the basement cement. Currently, my washing machine and water softener drain into the open top of the pipe. I want to add a laundry sink to the mix. Can I simply "T" into the drain about half way down or does something else need to be done to prevent the washing machine discharge from flowing back into the sink? Attached is a little diagram of what I am looking at.

Thanks for any advice you all can throw my way!
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Old 03-04-2013, 10:19 AM   #2
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Adding laundry sink - Can I "T" into washer drain?


Not going to work right----there is a P-trap below that washer stand pipe---t must be after the P-trap----

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Old 03-04-2013, 11:05 AM   #3
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Adding laundry sink - Can I "T" into washer drain?


I was afraid of that. Anything that can be done short of busting out the cement? My 6" main drain is about 6 feet away... perhaps I could "T" into that to drain the washer.
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Old 03-04-2013, 11:14 AM   #4
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Adding laundry sink - Can I "T" into washer drain?


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I was afraid of that. Anything that can be done short of busting out the cement? My 6" main drain is about 6 feet away... perhaps I could "T" into that to drain the washer.
Remove the standpipe- convert it to the laundry sink. Then discharge the washer into the sink
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Old 03-05-2013, 11:28 AM   #5
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Adding laundry sink - Can I "T" into washer drain?


I wouldn't care if it siphoned out the p-trap under my laundry sink... but would it cause my sink to "back fill" with washer discharge?
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Old 03-05-2013, 11:35 AM   #6
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Adding laundry sink - Can I "T" into washer drain?


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I wouldn't care if it siphoned out the p-trap under my laundry sink... but would it cause my sink to "back fill" with washer discharge?
Your sink will fill part way with water but assuming the drains are sized right and running clear- it shouldn't be an issue.
Can you upload a picture of your current set up? There might be a way to wet vent the sink. But it's hard to say without looking at your current configuration
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Old 03-07-2013, 09:47 AM   #7
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Adding laundry sink - Can I "T" into washer drain?


Would this work? Even if it did siphon out the sink p-trap in this configuration, does it really matter? Doesn't the under-floor trap take care of sewer gas?

I'm not a plumber and I have learned a lot in trying to figure this out. Past help and additional ideas are greatly appreciated!

Thanks!
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Old 03-08-2013, 06:28 AM   #8
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Adding laundry sink - Can I "T" into washer drain?


There is a possibility that the washer will flood the sink if the drain ever slows down---that will be the only major draw back to that set up----and it is not code compliant---

Will it drain properly? Yes----

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