On Tuesday, August 29, 2017 at 5:14:11 PM UTC-4, Bruce Land wrote:
replying to Wayne Whitney, Bruce Land wrote:
Make a u shape in your washers disharge pipe, this will allow water to be
traped. Make sure the area where the washer pipe joins the sewer line is
properly sealed.

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How does one "properly seal" where the washer hose joins the sewer line? What you just proposed does not meet code, period, so the question is rhetorical. Plus it's an old thread, the kind homemoanershub folks like to find and reply to as if the person is waiting for an answer.