Cure for Dripping Frost Dump Valve (1 Viewer)

[Duck Truck]

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

 

[Lenny HB]

You will probably have to buy the complete unit, keep a good stock of Truma spares.

 

[Duck Truck]

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

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[Flamenca]

Have you measured the existing rubber washer?

 

[Duck Truck]

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

 

[iandsm]

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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[Duck Truck]

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

 

[Mikeco]

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.

 

[iandsm]

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

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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[rangi]

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

 

[Duck Truck]

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

 

[TheBig1]

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

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[Duck Truck]

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

 

[Duck Truck]

thanks Big 1 next stop if i cant replace it
Kev