RV toilets get replaced for two reasons: the original plastic bowl has stopped rinsing clean, or the flush valve seal no longer holds water. Both are ordinary wear items, and both push owners toward the same short list of gravity-flush replacements.
The Dometic 310 sits at the centre of that list, largely because it is widely fitted as factory equipment, which makes parts and seals easy to find years later. This review looks at what the ceramic bowl changes, what gravity flush requires of your plumbing, and where a different design would serve you better. It is research-based rather than hands-on.
The product at a glance
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Reviewed Here
Dometic
Dometic 310 Gravity-Flush RV Toilet
Best for: Standard travel trailers and motorhomes
Key feature: China (ceramic) bowl for scratch resistance
A widely installed gravity-flush ceramic RV toilet with a foot-pedal flush valve, commonly found as factory equipment across many towable and motorized RVs.
Mid-Range ($$)| Product | Our pick | Best for | Price tier | Key feature | Check price |
|---|---|---|---|---|---|
Dometic Dometic 310 Gravity-Flush RV Toilet | Reviewed Here | Standard travel trailers and motorhomes | Mid-Range ($$) | China (ceramic) bowl for scratch resistance |
Price tiers $ Budget · $$ Mid-range · $$$ Upper mid-range · $$$$ Premium · $$$$$ Flagship. We show tiers rather than prices — check Amazon for the current price.
The full review
Reviewed Here
Dometic
Dometic 310 Gravity-Flush RV Toilet
A widely installed gravity-flush ceramic RV toilet with a foot-pedal flush valve, commonly found as factory equipment across many towable and motorized RVs.
Why it stands out
Widely used as OEM equipment, so replacement parts and seals are easy to find.
Best for
Standard travel trailers and motorhomes
Not ideal for
Rigs needing to route waste horizontally to a remote tank
Key features
- ◆China (ceramic) bowl for scratch resistance
- ◆Foot-pedal operated flush valve
- ◆Standard or high-profile bowl height options
- ◆Compatible with standard RV toilet flanges
- ◆Sealed water valve to reduce odor
Pros
- Reliable, well-known design
- Easy parts availability
- Available in standard and high-profile heights
Considerations
- Not suitable for remote tank placement
- Foot pedal mechanism can wear over years of use
Final verdict
Dometic 310 Gravity-Flush RV Toilet suits buyers who prioritise standard travel trailers and motorhomes. Worth knowing: Gravity-flush toilets need the black tank positioned directly below or very near the toilet.
Why the ceramic bowl matters
The practical difference between a plastic and a ceramic RV toilet is not luxury, it is surface. Plastic bowls scratch, and once scratched they hold residue and stain, which is why an older plastic bowl looks unclean no matter how much you scrub it.
A china bowl resists that wear and rinses down the way a household toilet does. It also weighs more, which matters when you are lifting it into place alone, and it can crack if struck hard — an argument for care during installation rather than against the material.
What gravity flush requires
Gravity flush means exactly that: waste falls into the black tank directly below or very close to the toilet. It is simple, uses no pump, and has few components to fail — which is why it dominates RV plumbing.
The constraint is layout. If your black tank is not positioned under the toilet, or you are moving the toilet during a renovation, gravity flush is not an option and a macerating toilet is the design that solves it.
Standard or high-profile
The 310 is offered in standard and high-profile bowl heights, and this choice affects daily comfort more than any other specification on the page. High-profile sits closer to a residential toilet height and is generally more comfortable for adults; standard-profile fits tighter bathroom layouts and small rigs.
Measure the space in front of the bowl before ordering. RV bathroom clearances are unforgiving, and the taller unit occupies more of it.
Installation and parts
Replacement is a bolt-and-seal job on a standard RV flange: shut off water, drain, unbolt, replace the floor seal, set the new unit and reconnect. The floor seal is the part people reuse and regret.
The strongest long-term argument for the 310 is unglamorous — because it is so widely installed, flush valve kits, seals and pedals remain readily available, which is what determines whether a toilet is worth repairing in year eight.
Keep reading
Frequently asked questions
Final verdict
The 310 earns its position as the default replacement: a ceramic bowl that stays clean, a simple mechanism, and a parts supply that will still exist when it needs a seal. Only layout constraints or a renovation should push you toward a different flush type.
Editorial Team
TopPremiumPicks Editorial Team
The TopPremiumPicks Editorial Team researches and compares premium products across multiple categories using manufacturer specifications, professional reviews and customer feedback. Our guides are research-based and do not represent hands-on product testing.