HOT WATER DE-SCALE

Discussion in 'Motorhome Chat' started by Goldenoldies, Aug 22, 2016.

  1. Goldenoldies

    Goldenoldies Funster

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    I need to de-scale the hot water system. What is the best way to go about this and does it affect the fresh water tank in anyway. We use the M/H most of the time so quickest method possible would be very useful. I have been told white vinegar does the job but as said would this affect the water tank. Thank in antisipation for any advice.
     
  2. Stroppy Bird

    Stroppy Bird Funster

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    This thread might be helpful

    http://www.motorhomefun.co.uk/forum/threads/cleaning-truma-boiler-with-citric-acid.127399/

    Truma used to do a specific product for descaling the boiler but when you looked at the make up of it, it was basically citric acid.

    I did mine using 500g citric acid diluted in about 25 litres of water (I think) into the fresh water tank and ran it through into the boiler through both the hot water taps until the fresh water tank was empty. I then left it for an hour and then flushed through the whole system with fresh water. Citric acid won't taint the same way that vinegar might.
     
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  3. Bobby22

    Bobby22 Funster

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    1, empty fresh tank and hw system
    2, fill with 30 l of fresh water and 5 litres of vinegar.....cheapest will do.
    3, heat solution for ten minutes and leave to cool
    4, draw through hot water system
    5 heat solution for another 10 minutes
    6 draw through all hot pipes and leave in pipes over night
    7 drain fresh tank and boiler
    8 flush out fresh tank and boiler until smell of vinegar goes away.
     
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  4. Lenny HB

    Lenny HB Funster

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    I do the same as @Bobby22 except I use white wine vinegar which Truma used to recommend, always stock up in France less than 30p Lt.
     
  5. Diabalo

    Diabalo Funster

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    How do you know it needs de-scaling?
     
  6. Lenny HB

    Lenny HB Funster

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    When it takes longer to heat up. Better to do it regularly to prevent a build up of chalk I do mine every 12 - 18 months.
     
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  7. Bobby22

    Bobby22 Funster

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    I probably learned it from you on here.
     
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  8. Gromett

    Gromett Funster

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    I use Food Grade Citric acid. It doesn't leave the vinegary taste/smell.

    This is the stuff I use... http://amzn.to/2bLONiP

    I also don't do the whole system. I drain a little out of the boiler, then disconnect the top hose (outlet) pour the already hot solution in. Reconnect the pipe and turn it on.
    I leave it for 20-30 minutes then use the dump valve to drain the lot off. Then refill and drain again.

    While I am at it I disconnect my shower hose/head and soak that in solution as well.
     
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  9. Steve

    Steve Funster Life Member

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    While 'doing' the heating system why not do the whole system with one of the many 'bio cleaning' agents around? water tanks and pipes can become a great breading ground for some nasty bugs.(y)
     
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