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  1. #1
    Join Date
    Mar 2007
    Location
    Philadelphia PA
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    3,177

    Default dishwasher drains into laundry tub?

    Here's a question I never thought I'd have to ask:

    If it's ok for a clothes washer to drain into a laundry tub, what about a dishwasher? Anyone ever see such a thing?

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    "There is no exception to the rule that every rule has an exception." -James Thurber, writer and cartoonist (1894-1961)
    www.ArnoldHomeInspections.com

  2. #2
    Join Date
    Jul 2010
    Location
    Wisconsin
    Posts
    274

    Default Re: dishwasher drains into laundry tub?

    Itís pretty much a no in the WI plumbing codes. Clothes washers shall discharge via air-break, which could be a sink. But, in our code residential dishwashers can discharge via air-gap or air-break under the counter or above the counter and is pretty detailed about the connections. The only exception that comes to mind off the top of my head is portable dishwashers.


  3. #3
    Join Date
    Oct 2010
    Location
    Southwest US
    Posts
    585

    Default Re: dishwasher drains into laundry tub?

    Kind of disgusting, but I can't see a problem with it.

    END GLOBAL WHINING

  4. #4
    Join Date
    Jul 2008
    Location
    Snowbird (this means I'm retired and migrate between locations), FL/MI
    Posts
    4,086

    Default Re: dishwasher drains into laundry tub?

    kitchen sinks, waste grinders, dishwashers and toilets are generally considered black water waste and must be discharged into the sanitary system (continuous contiguous closed direct waste transport connections).


  5. #5
    Join Date
    Aug 2010
    Location
    BC Canada
    Posts
    368

    Default Re: dishwasher drains into laundry tub?

    Why was the DW set up at laundry?


  6. #6
    Join Date
    May 2010
    Location
    St. George, UT
    Posts
    217

    Default Re: dishwasher drains into laundry tub?

    I guess we are looking at the sanitation side of this, but A related problem would be the danger of scalding since most dishwashers heat the water to 140+. Someone using the sink when the dishwasher discharges could be a safety concern.


  7. #7
    Join Date
    Aug 2011
    Location
    Bennett (Denver metro), Colorado
    Posts
    1,394

    Default Re: dishwasher drains into laundry tub?

    I usually see this in very old homes. Back in 2008, there was a similar thread about this topic. The problem with these setups is that they rarely discharge above the flood line of the sink.


  8. #8
    Join Date
    Mar 2007
    Location
    Philadelphia PA
    Posts
    3,177

    Default Re: dishwasher drains into laundry tub?

    Quote Originally Posted by Peter Louis View Post
    Why was the DW set up at laundry?
    The laundry is in the basement directly under the kitchen.

    "There is no exception to the rule that every rule has an exception." -James Thurber, writer and cartoonist (1894-1961)
    www.ArnoldHomeInspections.com

  9. #9
    Join Date
    Mar 2007
    Location
    Spring Hill (Nashville), TN
    Posts
    5,847

    Default Re: dishwasher drains into laundry tub?

    I would report it as "unconventional" and that unconventional items tend to preform in unconventional ways.

    I think how it is connected depends if your area uses the IRC or UPC. Neither say it is OK to drain directly into a sink.

    Scott Patterson, ACI
    Spring Hill, TN
    www.traceinspections.com

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