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Valliant ecotec 837-losing pressure often-topping up almost daily now

Discussion in 'Plumbing and Central Heating' started by funtins, 3 Mar 2018.

  1. funtins

    funtins

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    Hi, having issues with my Valliant ecotec 837 and is losing pressure often. I am topping up almost daily now.

    How do I fix this? Is it an easy fix?

    Help pls!

    Thanks !
     
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  3. terryplumb

    terryplumb

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    Would need a lot more detailed info before being able to offer meaningful advice . you may have a leak internally ,or expansion vessel not functioning properly to name the two most obvious ,but there are other possibilities.
     
  4. funtins

    funtins

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    ok fair enough mate. what other info is required?
     
  5. terryplumb

    terryplumb

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    First thing , is water being expelled from the copper pipe ,outside ,that is the pressure relief pipework. May be difficult to notice in current weather, and not to be confused with the plastic condensate pipe. Your usual pressure would be around 1 bar cold and up to around 2 bar when system hot. If it rises to 3 bar the prv should open and allow water out the copper pipe ,it would be doing its job. So you need to monitor your pressure gauge and let's know what you observed .water leaks on radiator valves / pipework /joints etc would be a reason for slow pressure loss if its a slow weep. Not always obvious as small amounts can evaporate away so you need to look really closely for any tell tale signs ,even if not wet. That'll do for starter's
     
  6. funtins

    funtins

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    ok thanks i will look...."the copper pipe ,outside"-how do i locate this?
     
  7. funtins

    funtins

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    the pressure has dropped to as low as 0.6 hot. i keep topping up as i dont want to damage the boiler.
     
  8. terryplumb

    terryplumb

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    It would usually come thru the wall in the vicinity of the boiler ,to outside . somewhere below the flue. And the end of it should be terminated in a safe area and visible ,as very hot water ,as well as cold ,can expel from it.
     
  9. terryplumb

    terryplumb

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    Frequent adding of cold water can eventually dilute the chemical Inhibitor that should be in your sealed system ,and will promote corrosion , causing other issues.
     
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  11. funtins

    funtins

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    ah ok! how do top up the inhibitor?
     
  12. terryplumb

    terryplumb

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    Don't at this stage ,until water loss is sorted. But easy diy way is via a radiator ,towel rail is easiest. If you have one.
     
  13. funtins

    funtins

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    ok mate, will be going out to look for the copper pipe in a bit. thanks!
     
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  14. Paul Tarry

    Paul Tarry

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    We had this

    First was a cracked heat exchanger in a 6 month old boiler, they changed the full boiler as it was cheaper, then it happened again 6 maonths later, 1st thought same reason, eventually it turned out to be a weeping valve in the kitchen dripping past the floor tiles and soaking the concrete so no visable signe, British Gas found it with an infra red thermometer that showed a cold patch
     
  15. terryplumb

    terryplumb

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    *********
    Hex is one of them
     
  16. funtins

    funtins

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    i may have found the pipe in the conservatory (also found the covered drain there). the pipe is covered by a cupboard...
     
  17. funtins

    funtins

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    should i get some inhibitor for now and add it to the system (dont have a towel rail heater)
     
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