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Washing Machine Waste

Discussion in 'Plumbing and Central Heating' started by Emsee69, 11 Mar 2021.

  1. Emsee69

    Emsee69

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    Hi, The picture below shows the waste coming from a macerator in the downstairs WC and out through the wall into the stack. I need to site a washing machine in this area just to the right. My dilemma is how do I get my washing machine waste out without drilling a new hole in the wall? Any water would obviously go down the pipe which is not what I want. Would I be best coming out of the wall horizontally and tapping the WM waste into the top of the horizontal pipe aided by a non return valve? Hope this makes sense. upload_2021-3-11_18-30-3.jpeg
     
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  3. Nige F

    Nige F

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    I understand what you say but it won't work - and the compression fittings aren't good on a pumped waste ! Why have you got a macerator and why don't you want to drill a hole in the wall ?
     
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  4. Madrab

    Madrab

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    Yup +1, would avoid using anything but solvent weld on waste pipe that is to be subjected to any kind of positive pressure.

    I would advise a bit of a re-think on how everything is to run together.
     
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  5. just pumps

    just pumps

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    Compression fittings under a floor is never a good idea.
     
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  6. wgt52

    wgt52

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    Pretty sure joining a washing machine outlet into a macerator outlet would not be sensible as not only could washing machine waste be going into the macerator but even more of an issue would be macerator outgoings into the washing machine. 'Fraid it's drill another hole in the wall.
     
  7. just pumps

    just pumps

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    All depends on size of pipe, how and where the two pipes join and where the macerator is, that said seperate runs are the best.
     
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  9. Emsee69

    Emsee69

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    Sorry for the late reply guys. I couldn't remember my password. As for not wanting to drill a hole in the wall, I just lack the confidence (diyer, not a plumber). I've been left this by a so called plumber. Macerator was the only option for a downstairs toilet.
     
  10. Hugh Jaleak

    Hugh Jaleak

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    I think you need to find yourself a real Plumber, no Professional would have installed that, it is an absolute recipe for disaster. I think we need a lot more info here, what exactly is where for starters. May even be possible to run the WC in 4" pipe yet, and avoid the need for the macerator. If you do need to keep it, then that discharge pipework needs doing properly, if (when!) those compression joints come apart, you will have one unholy mess, especially if it's under the floor and not immediately apparent.

    Secondly, if that's the way I think it is, the pipework is fundamentally wrong anyway. It needs to rise immediately from the macerator then run horizontally, if that's running under the floor and then up and through the wall, it is not installed as per manufacturers instruction and will likely void the warranty on the macerator. Then you have the issue of the pipe sitting full of minced waste.....
     
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  11. Nige F

    Nige F

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    I would be interested to see outside photos of the stack, existing waste, and a manhole if nearby.
     
  12. HERTS P&D

    HERTS P&D

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    I would like to know more about the dog, it's looks beautiful.

    Andy
     
  13. just pumps

    just pumps

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    Not sure what is going on but in another post or forum; The macerator is sited around 3-4m away in another room to the right of the photo with outlet pipe running under the floor as shown before rising and going through the wall as shown into a short height vertical stub which the sink used to discharge into.
    From what I remember I doubt the black waste should enter this stub of pipe and it is smaller than a soil stack in size.
     
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