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Clearing a 25mm MDPE Blue Water Pipe

Discussion in 'Plumbing and Central Heating' started by Jim C, 9 Feb 2016.

  1. Jim C

    Jim C

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    Does anyone have any tips on how to clean a buried 25mm MDPE Blue Water Pipe. Its approx 80m long - its a cold water supply from a spring and peat lines the inside of the pipe after a few years. It has a drop of about 10m from the spring and I have the facility to blast water through it at 3 Bar back from the house to the spring but the flow rate is still very poor. I have thought about 'pigging' it with a ball bearing but worried I might get it stuck - any ideas

    thanks

    Jim C
     
  2. stardanny

    stardanny

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    Check if there is stopvalve, gate valve or lever valve isn't clogged.

    At 3 bars, that is fine, but you need to put more flow in it to clear it.

    Pigging with a ball bearing might be a good idea but risk getting stuck. You will need a strong air pressure to push it all the way to the end. 80 metres long, wow.

    At 10 metres, that will give you about 1 bar pressure which with 25mm size will give you slight poor flow.

    Daniel.
     
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  4. Something like a drain snake (new of course) might do the trick - might be difficult to find one with a full 10m reach - are both ends of the pipe accessible?

    The business end might need to be trimmed down to fit the MDPE bore
     
  5. Agile

    Agile

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    Why are you two talking about 10 m ?

    He says its 80 m long!
     
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  7. Eyesight must be failing - I could have sworn that when I read that post it said 10m!
     
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