--- In [email protected], "Andrew Dyke" <[EMAIL PROTECTED]> wrote:
 
> We had the same toilet problem in the summer, just before we set off 
on our 
> holiday cruise oop north. We now make sure the water fills to the 
correct 
> level before leaving the bathroom and always switch off the pump when 
> leaving LT.

I have the answer to this, it involves fitting a timed shower valve 
available from Screwfix (No.65124) in the toilet inline with the WC. To 
operate press the timed valve and then flush as normal, after 25 
seconds if the WC flush valve fails to seal then this one turns off the 
water.
They had them fitted to the toilets on the barge we holidayed on last 
year in France.


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