Tracing blockage in kitchen waste pipe

Discussion in 'Plumbers' Talk' started by Crevitus, Feb 14, 2022.

  1. Crevitus

    Crevitus New Member

    Hi all,

    I have a blocked kitchen waste pipe (shared by the sink, dishwasher and washing machine). Water was leaking out underneath the cabinet at the concrete floor level. I have dismantled the cabinet and PVC waste pipes down to the hole in the concrete floor. The PVC pipe just came straight out of the hole in the concrete. What is going on here? Is it safe to rod it or has the pipe disconnected from something under the concrete?

    Please see picture attached for the hole that is left.

    Attached Files:

  2. just pumps

    just pumps Screwfix Select

    Does it feel like a rubber collar is there where the pipe just came straight out.
  3. Crevitus

    Crevitus New Member

    Nothing that I can feel? All I can feel is sludge and the hard concrete of the sides. I poked a stick straight down and it feels like concrete too. Seems to slope away from the hole?
  4. It was probably just sat in the hole all this time, whilst not blocked the water will run away and all is fine, u would only notice when it gets blocked so the water backs up and comes out. If u clear the blockage and put the pipe back in it will most likely all be ok again but it would be wise to connect the pipe up with something more suitable, so should it block again it won’t flood the floor.
  5. just pumps

    just pumps Screwfix Select

    Wasnt it smelling gross with a pipe just pushed into a hole, anyway, it all needs cleaning first to see exactly what you have to work with.
    Deleted member 246321 likes this.
  6. MRY

    MRY Screwfix Select

    I have seen this sort of thing before, where a pipe leads through a concrete slab and discharges into a clay pipe which has just had a hole bashed out of the top of it... see if there's an inspection ("manhole") cover nearby, and see what's happening in there.
  7. Crevitus

    Crevitus New Member

    Thanks everyone for the advice. I have tried several times with the a coil/snake to go down and clear the blockage but after quite some distance it gets stuck and for the life of me I can't get through it. I have a manhole cover in the garden outside but checked that and it's looking good. Any other ideas?
  8. Crevitus

    Crevitus New Member

    It's worth mentioning that there is a conservatory Infront of the kitchen - the blockage might be in there somewhere, worth taking the lino up?
  9. I’d be trying to rod back from the man hole before taking Lino up. You might find as it’s a kitchen it’s blocked with fat and grease so may need jetting to clear it.
    MRY likes this.

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