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Washing machine filling with waste water when not in use

Discussion in 'Plumbing and Central Heating' started by joboro, 7 Aug 2021.

  1. joboro

    joboro

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    Hi there,

    So our washing machine is filling with what looks like waste water when not in use.
    I've got the drain hose raised right up to the underside of the worktop before coming back down and joining the sink waste on a spigot. The washer is on the left hand spigot and dishwasher on the right hand one.
    I also even tried fitting what I thought was a non-return valve with no luck.
    Please see pics and any advice appreciated.
    Thanks!
    thumbnail_IMG_0976.jpg
     
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  3. terryplumb

    terryplumb

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    Check the cleanliness of the trap and waste pipework for partial blockage. If the water can't escape fast enough when emptying the sink it will back up and siphon down the machines waste pipe.
     
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  4. just pumps

    just pumps

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    Do either sink take awhile to drain and make a gurgling sound. Both are signs of restriction in that pipework.
    Can see a tide mark on a vertical pipe so you might want to check that connection there whilst you are at it.
     
  5. Madrab

    Madrab

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    Something doesn't look right about that waste/trap setup. The trap/outlfow should be much lower than that. Certainly the P trap compression outflow should be lower than the appliance spigot Tee.

    The bottom piece of the trap's U bend should be connected the other way around onto the T Piece with the appliance spigot with the longer leg of the U section running downward before the compression connection is attached. The way it has been put together just now means that whole waste/Trap is full of water right up to the outflow.
     
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  6. Hugh Jaleak

    Hugh Jaleak

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    +1. I'd look at removing the current 'U' section from the bottom of the Tee, replace that with a new P trap, and rejoin to the outgoing waste pipe lower down. Currently the whole setup is remaining full of water, and looks like the weight is going to cause the joint to come apart where the trap connects to the Tee under the left hand bowl.

    Or alternatively, bin the lot, fir an appliance trap on each sink and common them into the waste pipe.
     
  7. Agile

    Agile

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    I am surprised that it does not flow back into the dishwasher but maybe that has some kind of non return valve. As stated the outlet to the waste pipe should be far lower.

    I had to solve a problem with a pumped kitchen waste that had to go up to ceiling level. The pump has a poor quality non return valve which leaked and caused the pump to cycle every 10 min as the vertical stack of water leaked back into it.

    I solved it with an oversized brass non return valve and adapters!
     
  8. just pumps

    just pumps

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    :confused: and most likely shortened the life span of the motor.
    All of which is not relevent to the post.
     
  9. Dereekoo

    Dereekoo

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    That waste is so wrong its unbelievable. Flip your u bend round and lower the outlet pipes as per my picture

    IMG_20210807_145700172.jpg
     
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  11. Madrab

    Madrab

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    Erm, I must say that's a bit harsh.

    I've seen an awful lot worse than that to be sure. All that's wrong is the waste has been put together to fit the the black outflow rather than the other way about.

    All it needs a bit of jigging around .... drop the outflow of the black waste pipe a bit with a bit of 40mm solvent weld, take the bottom off the u bend off , turn it around and then fit it to the waste again .... that should solve it.

    Quite an easy DIY faux pas and relatively easy to fix.
     
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  12. HERTS P&D

    HERTS P&D

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    Yes, the Ikea waste!

    Andy
     
  13. Dereekoo

    Dereekoo

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    But at least he doesn't have to read all the speal about something not looking right and gurgling sounds and who says its diy. Solution clear and concise with photo provided, no doubt its all sorted now. Man up .
     
  14. Madrab

    Madrab

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    Oh be quiet ... man up, really?? .... silly person

    It wasn't the solution, nor the the picture I responded to it was the opening comment that really wasn't needed. It isn't so wrong it's unbelievable, it could be a whole lot worse, it's simple as that, so wind your neck in.

    It reads as if he is doing the work himself ... may have installed that himself has tried solutions himself and we are on a DIY site, I know what that says to me ... most of the professionals on here give a brand new poster the benefit of the doubt and don't make erroneous judgements unless it's an obvious wind up.
     
  15. Bouy

    Bouy

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    Erm, I must say that's really awfully a bit harsh:( and leave my neck out of this.
     
  16. Madrab

    Madrab

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    o_Oo_Oo_O

    Sorry @Bouy but I'm a bit confused .... That wasn't a reply to you?
     
  17. joboro

    joboro

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    Thanks all. I'll give it a go this morning.
     
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