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Blocked sink waste

Discussion in 'Plumbing and Central Heating' started by daggermark, 18 Sep 2021.

  1. daggermark

    daggermark

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    My kitchen sink has quite abruptly become blocked, to the point it is taking an hour to drain away when full. It has 2 basket strainers and both are equally blocked.

    After unsuccessfully trying one of those bottles of sink unblocker, I ventured under the sink to remove the trap. However, I didn't quite find what I was expecting:
    IMG_20210918_221609072.jpeg

    Unless I'm missing something, there doesn't appear to be a trap? Any ideas what the thin piece of pipe sticking out of the elbow is?

    I'm thinking the next step is to take the waste apart, does this seem fair? Any help appreciated.
     
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  3. HERTS P&D

    HERTS P&D

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    All that pipe work needs replacing, there is no trap/s.

    Do you have a wet vac?

    Are you a house or flat?

    Is there a gully on the outside?

    Andy
     
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  4. daggermark

    daggermark

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    I thought as much.

    No wet vac unfortunately. This is downstairs in my house. The pipework disappears behind the units but the main waste stack is only 1m away (also indoors), so I'd be fairly certain that it connects into there.
     
  5. HERTS P&D

    HERTS P&D

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  6. daggermark

    daggermark

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    So far no issues upstairs, nor any sink backup when the loo is flushed, so I'm fairly sure the issue is somewhere in the pictured assembly (or worse, behind the units).

    Thanks for your help, I'll try sucking the blockage out!
     
  7. HERTS P&D

    HERTS P&D

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  8. John the plumber

    John the plumber

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    Who on earth fitted that pipework. As HERTS P&D as said,rip it out and start again.
     
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  10. daggermark

    daggermark

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    Par for the course in this house mate. Previous owners had a full renovation done by some cowboys, I've spent the last few years gradually putting it right.
     
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  11. John the plumber

    John the plumber

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    Won’t cost a lot to put that right (y):)
     
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  12. tell80

    tell80

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    Be rubber glove cautious now youve used chemicals.
    Like the guys have suggested above, I would replace all the plasttic and re-do with all one make new waste and trapped pipework. Maybe the water supplies and both sink wastes should be rearranged. Overflows should be connected and the washing machine waste hose should enter the sink cabinet high and be connected properly, use a double spigot fitting so that later a dish washer waste hose can also be connected.
    The unit back panel is only a thin hardboard that can be easily cut away. If you cut away the lower half and the plaster board behind it, it will give you a shot at the one metre run of the waste on its way to the soil pipe connection. can you pic the soil pipe boxing-in or does it go into or behind a unit?The 40mm waste pipe must fall from the sink trap to the soil pipe.
     
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  13. petit_pablo

    petit_pablo

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    Thats a shocker! Who ever fitted thats just cobbled together the free stuff that comes with the sink.
     
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  14. ETAF

    ETAF

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    The Isolator / Service valve on the flexible hose - is the copper side the water supply ? however, just if it goes up to any Taps , then its the wrong way round - see the arrow for the water flow direction
     
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  15. daggermark

    daggermark

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    Had a lot of fun and games today. First things first, I did eventually managed to shift the blockage with a wet vac - great shout thanks!



    That piece of plasterboard was completely loose and was hanging on the waste pipe, weighing it down. I've cut it all out.

    Several of the connections were missing their seals - I've found a lovely mix of silicone, plumbers mate, ptfe tape... I cobbled together fixes with spares I had, but I intend to replace the whole lot with a new kit.

    Some of the pipework seemed a slightly different size if that makes sense? Maybe 1mm too fat? I wanted to replace one of the compression nuts that was gummed full of silicone, but my spare wouldn't quite fit over the pipe.

    The spigot connection is actually the dishwasher, which I don't tend to use - I agree its configured wrong though! Absolutely nothing sealing that compression join, just plastic on plastic - by some miracle tho it doesn't appear to leak.

    The waste pipe did actually have a fall on it, which surprised me. About the only thing they got right, even if they did cut a massive notch out of the studwork to achieve it... It connects onto the soil pipe via a 90 degree bend behind another unit - managed to get my hand up the back once I took the dishwasher out to have a feel around.


    Shocker is kind I think! (n)


    Haha nice spot! The copper goes up to the tap.
     
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