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Discuss Non invasive leak detection in the Central Heating Forum area at

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  1. HawkWhiteFinger

    HawkWhiteFinger Member

    I've been asked to investigate pressure loss in a heating system.

    Pressure relief valve is ok.
    Expansion vessel is OK.
    Boiler heat exchanger is OK, plus it's a new boiler anyway.

    Cannot see leaks under the floors. But there is one screed floor with one radiator. The pipes are copper in a plastic sleeving. The start and end of the sleeving is visible, so would have thought water would have been seen coming from there if it were those pipes.

    It is a slow leak anyway, but can be seen on the gauge with the pressure loss.

    So, non invasive electronic leak detection type people time?

    Possible leak, nothing visible, slight loss in pressure noticed on the gauge. Expansion vessel ok, PRV not letting by.

    So, trace and access? Could they detect a leak if it were in screed which is covered by tiles/laminate?


    Thermal imaging camera can pick up some things
    Last edited by a moderator: Oct 17, 2018
  2. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Have you tried turning the boiler valves off to see if the boiler is leaking ?
    • Agree Agree x 1
  3. Last Plumber

    Last Plumber Trusted Plumber GSR

    Can you not do as Shaun said to prove whether it is Boiler or Heating then if it's Heating, cap off that section under screed and test again?
  4. king of pipes

    king of pipes Trusted Plumber GSR

    As above a process of elimination. Kop
    • Agree Agree x 1
  5. hammers4spanner

    hammers4spanner Plumber GSR

    As above , had it own home recently .Under laminate floor as well.
    Small pressure loss isolaTed boiler to prove it was circuit.

    Had leaks all over the circuit so ended up doing a full repipe via insurance claim.
    Last edited: May 25, 2018
  6. Last Plumber

    Last Plumber Trusted Plumber GSR

    Normally quickest, cheapest and most definite way!
  7. Gasinspect

    Gasinspect Member

    Seen good results of leak detection with a thermal imaging camera. good excuse to buy one, then a very useful bit of kit for flushing, fault detection, damp detection, insulation etc
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