Thetford toilet bowl fills while travelling

Gaffer

Well-known member
We have a 2015 Bighorn with a Thetford 42072 toilet. The bowl will be as much as 1/3 full after travelling a few hours. This is after disconnecting from city water, and never having used the pump. The pump is off and pressure released at the toilet via the flush lever before travelling. How is this even possible?
 

brianharrison

Well-known member
Maybe the wife is trying to drive you crazy by emptying her water bottle into the toilet when you're not looking?

Seriously though, the model of your toilet has a vacuum breaker higher than the bowl; possibly slow air leak allowing residual trapped water to flow into bowl while you are travelling.

Hope this helps,
Brian
 

wdk450

Well-known member
PJ:
Until you figure this out, why don't you just turn on the bathroom sink faucet after disconnecting from shore water when departing? This should bleed off any possible residual water pressure harmlessly into the drain.
 
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