Here is a quote from another forum. I know you haven't mentioned a "spraying", but maybe...
The toilet flush has a "vacuum break" which extends above the rim of the bowl at the back, to make sure that a full bowl cannot be drawn back into the fill line. These do fail and do spray water about.
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Steve & Sue
2017 Grand Design 297RSTS Travel Trailer
2017 Ford F-350 Lariat Crew Cab diesel 6.7 SW LB 11,500 lb GVWR package
Former: Crossroads ST26RB
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