Toilet flush/dribble.

Discussion in 'Tech/Mech General' started by TUCANO, Apr 6, 2015.

  1. TUCANO

    TUCANO Funster

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    Hymer 584A minor problem, again. The flush in the van toilet is little more than a dribble and I wonder if anyone has an idea of what is causing it.
    Is it possible to gently back flush the pan outlet to see if there is a blockage I wonder.
    I ask this because after finding no water from the sink tap last week I dismantled drawers etc and got under with a torch to find nothing amiss.
    Hours later the penny dropped, the tap filter was full of junk [​IMG]:whistle:
     
  2. rosalan

    rosalan Funster

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    I think you have answered your own question. How did you manage to get 'junk' into your water?
    If the tap filter was full of junk, what about the pump itself?
    I assume that your toilet is a Thetford and that it is an electric pump system, from an immersed pump. If so, if the bathroom taps work, the toilet should flush. If the taps have enough pressure, the toilet should also have enough pressure as it is the same pump. I would first expect any blockage to be in the flush outlet at the top of the pan unless you have another filter to clear. It may be possible to open a pipe under the van if it is not winterised to check the pressure.
    Alan
     
  3. hilldweller

    hilldweller Funster Life Member

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    The Thetford has an electric valve to pass the water, that may be gunged up.
     
  4. TUCANO

    TUCANO Funster

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    Thanks gents will investigate when I have the chance
     
  5. TUCANO

    TUCANO Funster

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    The junk that I referred to was, I assume, tiny pieces of whatever it is that dries out in the inaccessible parts of the water system when said system is drained over winter.
    I always drain the system and then flush it with a sterilizing solution, always pretty meticulous so it is an irritation.
    thanks again.
     
  6. JeanLuc

    JeanLuc Funster

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    What sterilizing solution do you use? I realise you may be using a non-bleach product, but compounds like Milton can damage seals which might lead to pressure loss although I don't think that applies here as it would probably affect the whole system and might also cause leaks. Just a warning of possible future problems.
     
  7. Photo4x4

    Photo4x4 Funster

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    Really? I was going to flush my system with Milton! What should I use then?

    Cheers

    KH
     
  8. JeanLuc

    JeanLuc Funster

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    I don't normally flush mine with anything as I drain down completely after each trip. Also, mains water throughout Europe contains chlorine in very dilute solution so the tank and pipes are sterilised each time you fill the system. (The chlorine concentration is so small as the present no effective risk to the seals.)
    If you feel uneasy at my approach and want to flush the system with a steriliser, I would suggest this http://www.leisurelines.net/tankkleen-fresh-water-tank-cleaner--steriliser-85-p.asp
    I have used it once a couple of years ago (and still have half a pot in the garage to use again one day).
     
  9. Lenny HB

    Lenny HB Funster

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    Could be the one way valve I'm sure there is one inline with the toilet to stop any back syphon to the fresh water tank.
     
  10. Lenny HB

    Lenny HB Funster

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    White wine vinegar, Truma used to recommend for descaling the boiler, until they brought out their own cleaner. We always stock up in France 33 cents/Lt.
     
  11. TUCANO

    TUCANO Funster

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    Thanks for all replies, I sterilizing the system with the usual tablets I have always used.
    I forget the name of them but I bought them from a guy on Facts, forget his name also at present [​IMG]
     
  12. JeanLuc

    JeanLuc Funster

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    If you are referring to 'Zappy', I think his tablets were pretty heavy-duty chlorine based.
     
  13. TUCANO

    TUCANO Funster

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    Zappy it was, T break over back to work here, enjoy the day.
     
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  14. Reallyretired

    Reallyretired Funster

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    I flush my system through with a gallon of white vinegar every two years, mainly for the boiler. I buy it on the net and get quite a lot at a time, as it is cheap but carriage is expensive.
     
  15. Abacist

    Abacist Funster

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    Anything chlorine based/Milton will invalidate your Truma warranty and start to rot the stainless steel inside the boiler. I use the same stuff that it is used to sterilise home beer/wine making equipment and a tub of that is cheap on Ebay. I think its called sodium metabisulphite
     
  16. catspyjamas

    catspyjamas Funster

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    Very interesting! I have the same problem with my Hymer. I've asked the dealer to investigate, they changed the water pump, but I still don't get a satisfactory flush. The water does not complete a circuit around the toilet bowl and often finishes at "twenty to" (as on a clock face) position.
     
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  17. TUCANO

    TUCANO Funster

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    My flush/dribble runs out on your clock analogy at five past, IF I am lucky [​IMG]
     
  18. Tootles

    Tootles Funster

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    Not a blockage, I think, but either the electro magnetic (12 volt) one way valve that controls the water direction to the loo, or the relay next to it, or both, or lastly, the spade connectors that they use. Take out the toilet roll holder, look down, (Thetford C2/C3/C4), and you can see both items, even get a hand to them. :)
    The one way valve does have a filter fitted on the input water side.......Check that as well.
     
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  19. TUCANO

    TUCANO Funster

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    Tootles
    Many thanks for that, my van layout is obviously different to your imagining because the toilet roll holder is/was simply screwed to the wall, before I removed it.
    I will try and investigate tomorrow at lunch break, thanks again.
    Norman.
     
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  20. Tootles

    Tootles Funster

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    Sorry Norman, thought you had the early model. Even so, same problem, but not sure on your access. (y)
     
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