Dometic RV Toilet Parts

What Dometic toilet models do these parts fit?

This collection covers replacement parts for the Dometic 300, 310, and 320 series RV toilets, the three most common porcelain and plastic-bowl models installed in late-model travel trailers and motorhomes. You will find water valves, vacuum breakers, foot pedal assemblies, flush ball kits, seals, and floor flange hardware sized for those specific units. Confirm your model number on the data label inside the bowl rim before ordering to make sure you get the correct fit.

Where can I find a Dometic 310 toilet parts diagram?

Dometic publishes an exploded parts diagram for the 310 in the official service manual, which lists every numbered component from the vacuum breaker (part 385230335) down to the floor flange seal. If you are diagnosing a leak or a weak flush, match the failed component to the diagram, then cross-reference the part number against this collection. For related consumables like bowl cleaner and holding tank treatment, see our Thetford holding tank chemicals.

Are Dometic 300, 310, and 320 toilet parts interchangeable?

Some parts cross over between the three models and some do not. The water valve and vacuum breaker are shared across all three series, but the flush ball, seal kit, and foot pedal assembly differ between the 300 (plastic bowl, single pedal), 310 (porcelain bowl, dual pedal), and 320 (full-height porcelain, dual pedal). Always verify the part number listed on your toilet against the product page before ordering.

How difficult is it to replace a Dometic toilet seal or flush ball?

Replacing the closet flange seal or flush ball assembly on a Dometic 300, 310, or 320 is a straightforward DIY job that takes about 30 to 45 minutes with basic hand tools. Shut off the water supply, flush to drain the line, remove the two floor bolts, lift the toilet, and swap the worn component. If you also need to service the bathroom vent during the same job, our Ventline vent accessories cover the most common replacement parts.

Does United RV Parts offer free shipping on Dometic toilet parts?

Yes. Orders over $100 ship free within the contiguous United States, which covers most multi-part toilet repair kits and full rebuild bundles. Smaller individual parts like seals, washers, and pedal springs ship at a flat rate. Need help confirming fitment before you order? Text or call our team at 817-984-1852.