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Thread: Washing machine and vent

  1. #1
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    New England

    Default Washing machine and vent

    My father has a drywell that he pumps the washing machine into. This is separate from the septic system. Since it is the only thing on the drain line, other than a trap, does it need a vent line, too? Course, I'm not sure if this is quite legal, either, but has been in use for decades. I'm not sure how different it is from just dumping it into the septic system. Any enlightenment here?
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  2. #2
    Plumbing Contractor srdenny's Avatar
    Join Date
    Sep 2004
    SF Peninsula


    Washing machine waste is sewage. It should not go into a dry well. It is and has been poluting your ground water. Even when hooked up to grey water systems, washer waste goes through some filtration. Plus it's diluted with discharges from other, non-detergent bearing fixtures.


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