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4" Pipe blocked

Discussion in 'Plumbing and Central Heating' started by sotal, 24 Sep 2017.

  1. sotal

    sotal

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    We have a drain at the side of our house which keeps over flowing. The kitchen sink drains into this.

    If I use the plunger I can get it flowing again but it quickly blocks up again.

    I've got a endoscope type camera which plugs into the PC and I can see where the blockage is but unfortunately it isn't easy to get to. It is about 5m down the 4" pipe just after a sharp bend.

    Personally I think the design of the pipes is particularly bad.

    The object has about another 4m to go to get to the manhole cover in the garden.

    The blockage is under the conservatory floor.


    Someone suggested that it might be possible to pressurize the pipe to try to shift the blockage. Do you think this would work? I have a compressor and could make an end cap with a tyre valve fitted. Just worried about making it worse!

    I've tried caustic soda, and hydrochloric acid but the blockage is plastic. These will both clean the gunk away from around the foreign body and allow a little bit of flow but won't shift the object itself.

    Any other ideas?
     
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  3. dpsservices

    dpsservices

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    Pay someone to jet it job done
     
  4. terryplumb

    terryplumb

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    drain rods ???
     
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  5. sotal

    sotal

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    Tried drain rods but they get stuck at the bend, no matter how much I try. They hit the end and just won't go round, I have used the camera to watch and through twisting etc I can get it to start to bend round the corner but just after the corner there is a lip and the rod gets stuck on there.

    Don't really want to get anyone in, but will have to resort to that if I can't but it is a drain that often blocks (poor design) - so would prefer to get a tool that has a good chance of clearing it so I can use it again in the future.

    Would a jetting pipe for my karcher pressure washer be worth a try?

    Or another alternative I've seen whilst searching was a drain cleaning bladder which inflates, seals then releases the water forwards. Would that have a chance of shifting it?

    Would my idea of the air compressor not work? My worry with that is it would clear the gaps around the blockage but not shift the blockage itself, I would need it to be fully blocked in order for it to work.
     
  6. dpsservices

    dpsservices

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    Did you try a wheel attachment on the end of your drain rods
    Regards david
     
  7. sotal

    sotal

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    No, I didn't have one of those, looks like it might be worth a try though. I take it the wheel will help it over the lip?
     
  8. dpsservices

    dpsservices

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    Yes as it will aid the rods to mount the lip as such. Only a few quid to buy on flea bay
    Regards david
     
  9. dilalio

    dilalio

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    I have a well-trained sewer rat called Jim!
     
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  11. Nige F

    Nige F

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    rod back from the manhole with a corkscrew attachment on the rods
     
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  12. Hugh Jaleak

    Hugh Jaleak

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    Really don't advise using any type of pressure, if it goes wrong, and the fact you've used chemicals down there, could be nasty. Corkscrew, as Nige says, if it'll get to where you need it, otherwise I think you need to bite the bullet and get someone in. High pressure water jetting gear should pull it back, if that doesn't work, then it's likely to be dig it up time I'm afraid.
     
  13. muggles

    muggles

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    Get someone in - it's not that expensive. Even here in expensive Oxfordshire it's only £70 for up to 2 hours of drain cleaning
     
  14. HERTS P&D

    HERTS P&D

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    Get it jetted. Max 30min on site.

    Andy
     
  15. SandyLyon

    SandyLyon

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    Some rods have a "locking" joint, older or cheaper ones don't, if using the later be careful to twist the rods so as to tighten the joints.
    It is possible for the joints to become undone while still in the drain, which makes it a much more difficult job.
     
  16. sotal

    sotal

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    Thanks for all the advice, I will try a wheel if that doesn't work I'll try getting someone in. Only about £3 from toolstation for a wheel so will grab one tomorrow.

    I'm struggling to rod back due to the depth of the manhole. I have to climb into the manhole cover to rod back but the angle ends up quite severe and there must be another bend which it gets stuck on. Rodding forwards is a lot easier.
     
  17. Nige F

    Nige F

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    Fair enough, don't go down manholes Dangerous gas can be present.
     
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