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Discuss Kitchen waste connection in the Fittings & Pipes area at UKPlumbersForums.co.uk.

  1. HLuc

    HLuc New Member

    Hello, I have a few questions about fitting a new kitchen sink.
    1. We live in a block of flats and with the old sink we occasionally used to get a backup of water into our sink even when nothing was running in our kitchen. Any suggestions on what to fit to stop this happening with the new sink?
    2. We used to have a washer/dryer next to the kitchen sink and sometimes if the dryer was on and we ran too much water in the sink the clothes would get wet again! I think this used to happen because the p bend to the dishwasher was lower than the one to the waste. This time we are having a dishwasher next to the sink but I want to make sure the same thing doesn't happen in the dishwasher - any ideas?
    Note: The waste pipe is quite high on the wall, so we can't have a great deal of downward slope from sink/dishwasher.
     
  2. scott_d

    scott_d Plumber GSR Top Contributor!!

    Hepvo trap might work
     
    • Agree Agree x 1
  3. CBW1982

    CBW1982 GSR

    If you were getting water in when yours isn’t in use then there will probably be a blockage somewhere. A hepvo valve may work as it’s like a non return valve. However depending on what else is connected it might start backing up into that.
     
    • Agree Agree x 1
  4. WC1

    WC1 Active Member

    1. (Unless it's coming from your own flat, e.g.. into the kitchen sink when you use the washing machine ) The partial blockage is in the shared pipe between you and the flat below hence when water is used above it does out in yours. Get the landlord on it asap before it becomes fully blocked and backs up catastrophically when they run a bath upstairs. See attached.

    2. See above.

    20190128_091757.jpg
     
    • Agree Agree x 1
    • Winner Winner x 1
    Last edited: Mar 19, 2019
  5. Harvest Fields

    Harvest Fields S. Mod Trusted Plumber GSR Top Contributor!!

    That is some blockage
     
    • Agree Agree x 1
  6. WC1

    WC1 Active Member

    On multiple occasions I've seen multiple properties ruined when people are away when it happens :eek::eek:
    "But when we left it was only a blocked sink":oops::oops:
     
    • Like Like x 1
    • Funny Funny x 1
  7. Andy B

    Andy B New Member

    A picture paints a thousand words.

    Meanwhile downstairs (re)paints their ceiling...
     
  8. HLuc

    HLuc New Member

    Thanks, yes we did get the landlord round to clear it and it worked for a while but began gurgling again. I just wondered if there was some sort of one way valve that would prevent ever happening again.
     
  9. WC1

    WC1 Active Member

    Clearing the blockage will prevent it happening again!
     
    • Agree Agree x 1
  10. WC1

    WC1 Active Member

    A one way valve might stop it coming out of the main stack to you but once main is blocked / partial then water will push against the one way and seal it closed so your flat won't drain, then the main stack will fill, up to your neighbours bath and then it will overtop and come thorugh your ceiling. Sorry, get someone who can to clear the blockage, also get everyone to keep hair, coffee grounds and chipfat out of the pipes, I find these are the main causes. might want to get a cctv survey for burrs, poor joints on main.
    What floor are you on and how many in total, is it private let, does landlord own the lot?
     
    • Agree Agree x 1
  11. YorkshireDave

    YorkshireDave Plumber Top Contributor!!

    And I repaint the floor 'chunder' colour with the smell o_Oo_Oo_O
     
  12. YorkshireDave

    YorkshireDave Plumber Top Contributor!!

    Without being rude, it really IS your landlords responsibility - fully, completely, totally, 100% aly.
    Just do not take no for an answer. If our answers do not convince you, talk to your local environmental health officer. They will make 'em shift their lazy ar5es. Good luck. ;)
     
    • Like Like x 1
  13. CBW1982

    CBW1982 GSR

    I once attended a block of flats whereby the main drains were blocked (tree roots I think it was), customer in downstairs flat wasn’t in for a day or so, came home to find the proverbial on the floor - Nice
     
    • Like Like x 1
  14. HLuc

    HLuc New Member

    Thanks everyone, I will get on to them to clear it again.

    Would this have been the cause of the sink water making clothes wet though?

    See picture attached, we've now got a dishwasher next to the sink and this is the new plumbing - the dishwasher pipe will go into the bit circled in yellow. Does this set up look like it will prevent sink backing up into dishwasher? Also, will the dishwasher be able to drain properly? WhatsApp Image 2019-03-22 at 14.17.34.jpeg
     
  15. CBW1982

    CBW1982 GSR

    Looks to me like that’s running up. Dishwasher will probably drain as it’s pumped, but you may get water stuck and smells emanating from the trap.
     
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