I have a Keystone Cougar 21RBS equipped with a Dometic 310 toilet. Everytime I travel with it, water sloshes from the toilet unto the floor and into the heater vent. I have been careful to ensure that the pump is off and that all water is gone from the bottom of the toilet prior to departure. Despite this, water still sloshes to the floor. The only way I can avoid this is to place an old rag or towel into the toilet before departure. When I arrive at my destination the towel is saturated. Both Dometic and Keystone say they have never heard of this happening despite Dometic's acknowledgment that water will remain in the "rib flush" portion of the toilet after flushing. Has anyone else encountered this problem?

I've never emptied the bowl before towing. Never thought about that but I've never had any water slosh out of the toilet.

Sounds to me like the "air gap" at the TOP of the toilet may be holding fresh water after you flush. It is supposed to drain out after the water is turned off at the end of the flush.In some cases you can take the top of the toilet off and you will see where the water fill valve squirts water across a open space into a channel, this is the air gap. The channel then goes around the top of the toilet bowl and spills out into the bowl.You may have a miss shaped part that is holding water after the flush and when traveling it splashes out of the top and onto your floor.

Your fill valve is leaking. It needs to be repaired.

After flushing toilet the vacuum breaker should drain into bowl (water in bowl is a vapor barrier). Should only be a few ounces.It sounds like the toilet rim where the water flows into bowl is retaining excess water.Are all the holes in rim free & clear?

If it is under warranty, have it replaced. It certainly is defective.

Dometic toilet sloshes water unto floor | Good Sam Community

camperforlife
Explorer
Sep 14, 2013
If it is under warranty, have it replaced. It certainly is defective.
Old-Biscuit
Explorer III
Sep 14, 2013
After flushing toilet the vacuum breaker should drain into bowl (water in bowl is a vapor barrier). Should only be a few ounces.

It sounds like the toilet rim where the water flows into bowl is retaining excess water.
Are all the holes in rim free & clear?
tomousecap
Explorer
Sep 13, 2013
Your fill valve is leaking. It needs to be repaired.
Gdetrailer
Explorer III
Sep 13, 2013
Sounds to me like the "air gap" at the TOP of the toilet may be holding fresh water after you flush. It is supposed to drain out after the water is turned off at the end of the flush.

In some cases you can take the top of the toilet off and you will see where the water fill valve squirts water across a open space into a channel, this is the air gap. The channel then goes around the top of the toilet bowl and spills out into the bowl.

You may have a miss shaped part that is holding water after the flush and when traveling it splashes out of the top and onto your floor.
mileshuff
Explorer
Sep 13, 2013
I've never emptied the bowl before towing. Never thought about that but I've never had any water slosh out of the toilet.

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Dometic toilet sloshes water unto floor

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