Washing machine and vent

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by jadnashua, Jan 2, 2007.

  1. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Sep 2, 2004
    Retired Systems engineer for defense industry.
    New England
    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?
  2. srdenny

    srdenny Plumbing Contractor

    Sep 11, 2004
    Plumbing Contractor
    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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