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Dometic toilet mystery filling/leaking


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Last night our toilet slowly filled with water by  itself. Thankfully we caught it before it overflowed. This afternoon there was water at the base for no apparent reason. I visually inspected the hose connections and the foot pedal mechanism, and see no evidence of a leak or problem. Any ideas as to why and how to fix are appreciated. Duane and Donna 

2018 Elite

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My guess, fill is leaking. Our foot pedal sometimes sticks. My guess, yours is too, but just slightly. 

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There are simply not all that many ways for the bowl to fill.

1 - pour fluids in from the top 🙄

2 - fluids come up from the bottom 🤢

3 - fresh water fill valve is defective.

4 - foot pedal is either defective or stuck (as SeaDawg suggests).

#'s 1 & 2 are not very likely.  # 4 is a bit of a problem in that how would one "un-stick" it other than playing around with it (i.e.  operate it numerous times and see if that cures the issue). 

# 3 is the most likely cause- I'd try opening the valve by fully stepping on the pedal a number of times as there just may be a small piece of debris in the line that might clear.

Past this its off to YouTube to learn how to replace the valve and possibly the foot pedal which operates it or take the camper in for service.

Good luck!


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