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Discuss CWSC overflow dripping in the Plumbing Forum area at

  1. Dan1706

    Dan1706 New Member

    Any help here would be appreciated. My overflow pipe from the CWSC in the loft is dripping. It is not a constant drip. I have regualry been checking the level in the loft but is never at the level of the overflow pipe. I am confused as to how this is happening.

    Is there any other reasons for why a drip can occur?

  2. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    How old is the ball valve ?
  3. Dan1706

    Dan1706 New Member

    I would say very old. The cistern is the open type with just insulation covering the top.
  4. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    I would change that as a first port of call could be that dripping at night when the mains water pressure is at the most
  5. Dan1706

    Dan1706 New Member

    Ok, thanks for that. I will do that first and see what happens.
  6. rpm

    rpm Trusted Plumber

    Is there a 22mm copper pipe that comes up, over and drops back down towards the tank?
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