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Thread: Washing machine/sink drain and vent

  1. #1
    DIY Junior Member garrettgjp's Avatar
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    Default Washing machine/sink drain and vent

    I am a new home owner and this will be my first ever DIY plumbing project.

    My washing machine drains into the laundry sink and I am wanting to have it drain into a seperate pipe and figure out how to vent it properly as well. I have included pictures of the current setup, any suggestions or advice would be greatly appreciated since I am not sure how to go about this correctly.

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  2. #2
    Plumber jimbo's Avatar
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    The photo shows an S-trap which is illegal, because it self-siphons. Also, it appears to drain into a drain stack, and therefor there is no vent.

  3. #3
    Test, Don't Guess! cacher_chick's Avatar
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    First you will have to cut out a section of the cast iron and install wyes for the new drains. Then you will have to run a new vent from the basement up through the roof. Unless you are well equipped and quite skilled, this will not be a very good project for you to learn about plumbing.

  4. #4
    DIY Senior Member Hammerlane's Avatar
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    Above fitting #5, there can be no other fixtures draining into that stack to have that vent setup be proper?
    Attached Images Attached Images  

  5. #5
    Test, Don't Guess! cacher_chick's Avatar
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    Quote Originally Posted by Hammerlane View Post
    Above fitting #5, there can be no other fixtures draining into that stack to have that vent setup be proper?
    That is Correct!!

  6. #6
    DIY Junior Member garrettgjp's Avatar
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    Thanks, this is clearly over my head. I'll hire someone to take this on and watch and learn. Thank you again to everyone who responded!

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