Cure for Dripping Frost Dump Valve

Discussion in 'Heating and Air-Conditioning' started by kev1, May 10, 2016.

  1. kev1

    kev1 Funster

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    We have a Hobby 750 year 2000
    fitted with a Trumatic C Boiler
    The frost Dump valve is a separate unit.

    The valve developed a drip leaking water constantly.
    It's easily accessed. I took the valve apart a simple operation and inside it had a rubber washer very similar to those in a flush valve in a toilet tank at home.

    The drip was caused by a build up of lime scale. I cleaned it out and the drip stopped.
    however 6 months later it's started again. it could do with the washer replacing a simple job EXcept i can't find any stockists. Everyone wants to sell me a new dump valve at £82.

    Does anyone know where we could locate a rubber washer.

    Many thanks
    Kev
     
  2. Lenny HB

    Lenny HB Funster

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    You will probably have to buy the complete unit, Leisure Shop Direct keep a good stock of Truma spares.
     
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  3. kev1

    kev1 Funster

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    Hi Lenny yep they gave me the quote
    Thanks for replying
    The valve works fine a new rubber washer for a toilet flush costs about 40p
    so I am keen to see if I can get a washer rather than a new valve
    Kev
     
  4. Flamenca

    Flamenca Funster Life Member

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    Have you measured the existing rubber washer?
     
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  5. kev1

    kev1 Funster

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    Hi Chris I didn't measure it
    but it would be ralativley simple to remove it
    to measure it if anyone has an idea as to a supplier
    It is a slightly different profile to a toilet flush washer
    Kev
     
  6. iandsm

    iandsm Funster

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    once you have removed the valve try soaking it I a large jug of white vinegar, it worked for me. You could probably stop up the outlet hose at the bottom of the van then undo the inlet from the supply and put on a hose, then fill with vinegar that would save you removing it, either way it's the limescale that's the problem and you won't have to take it apart.
     
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  7. kev1

    kev1 Funster

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    Hi ian yep i soaked it in white vinegar last time
    however I think the washer is nearing the time it needs replacing as well
    Thanks again for taking the time to reply mucha ppreciated
    kev
     
  8. Mikeco

    Mikeco Funster

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    I fitted a new Truma to a friends van and I could not stop the automatic dump valve from dripping, according to the supplier there was a problem with quite a few of them so he gave me a manuel one to fit. Could be an option.
     
  9. iandsm

    iandsm Funster

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    Have you considered taking the washer to a plumbing supplier or building material supplier. I cannot think the Truma have them specially made for them and that it is not an item unobtainable elsewhere. Good luck.
     
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  10. rangitira

    rangitira Funster

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    I got an electric auto dump valve, (needs a live feed if you are going to use it) just cluttering up a shelf in the garage
     
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  11. kev1

    kev1 Funster

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    Thanks Ian i considered that after I re assembled it the first time lol

    I was in a bit of a rush
    I was hoping someone else had maybe done that before me and has some success and I could
    get info from them
    Kev
     
  12. TheBig1

    TheBig1 Funster Life Member

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    clean it with vinegar, dry the washer and coat with a thin smear of vaseline
     
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  13. kev1

    kev1 Funster

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    Hi Rang
    I dont know if the one fitted uses a feed or not
    if you get chance to take a pic of it
    and send it or post it here it would be appreciated but if Like my garage its a three day joub to burrow in to it dont panic
    Kev
     
  14. kev1

    kev1 Funster

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    thanks Big 1 next stop if i cant replace it
    Kev
     
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