Stop living with a cracked, stained, or broken toilet seat in your RV. The Dometic 385311647 is the genuine OEM seat and lid kit engineered specifically for Dometic 300, 310, and 320 series toilets -- no drilling, no adapters, no guesswork. Swap it out in minutes and restore your bathroom to like-new condition.
Dometic's 300 series toilets are among the most common residential-style RV toilets on the market, found in Class A motorhomes, fifth wheels, travel trailers, and Class C rigs from dozens of manufacturers. After years of road vibration, temperature swings, and heavy use, hinges crack, lids warp, and seats discolor. The 385311647 kit brings your toilet back to factory spec using the same materials and mounting geometry Dometic used when they built the toilet.
This is an OEM Dometic part, not an aftermarket substitute. The hinge mounting points, seat width, and lid contour are designed to match the 300/310/320 bowl rim exactly. Aftermarket universal seats rarely sit flush -- this one does.
Engineered to Dometic's original specs for the 300, 310, and 320 series toilet bowls. Hinge pins and mounting posts align without modification.
Includes both the seat and the lid as a matched set, plus the hardware needed for installation. No separate sourcing required.
Molded from high-impact plastic formulated to resist the UV exposure, cleaning chemicals, and temperature cycles common in RV environments.
Attaches using the same bolt pattern as the original. Most owners complete the swap in under 15 minutes with basic hand tools.
The 385311647 seat kit is compatible with the following Dometic toilet models:
If your toilet bowl has the standard Dometic rounded-front profile and the two rear hinge bolt holes spaced to Dometic's 300-series pattern, this seat kit will fit. If you have a Dometic 200 series (the smaller, more compact unit) or the 500-series ceramic bowl toilet, this is not the correct seat -- verify your model number on the label inside the toilet cabinet or on the underside of the tank.
Replacing a Dometic 300-series toilet seat is a straightforward job that requires no plumbing disconnection:
No water needs to be shut off. No seals are disturbed. This is a surface-level swap only.