When your RV toilet leaks around the bowl or fails to seal after flushing, the flush ball assembly is almost always the culprit. The Dometic 385318162 is the correct OEM-spec replacement for Sealand and VacuFlush toilets equipped with metal or plastic foot pedals -- restoring a proper watertight seal and smooth flush operation in one complete kit.
The flush ball assembly sits at the base of your toilet bowl and rotates open when you press the foot pedal, allowing waste to drop into the holding tank. Over time the ball, rotor shaft, or spring cartridge wears down, causing the ball to stick, leak, or fail to open fully. Replacing the entire assembly -- not just the ball -- ensures every wear surface is renewed at once.
Dometic part number 385318162 ships as a complete kit with every component needed for a full rebuild: the flush ball itself, the rotor shaft that drives its rotation, the spring cartridge that returns it to the closed position, and the fasteners to secure the assembly. No sourcing individual pieces separately.
Includes flush ball, rotor shaft, spring cartridge, and all required fasteners -- everything for a full swap in one box.
Fits DOM69FR, DOM79FR, DOM89FR, DOM29FR, and other Sealand and VacuFlush toilets with metal or plastic foot pedals.
Manufactured to original Dometic specifications -- correct fit, correct materials, no modification required.
Produced domestically to Dometic quality standards. Lightweight at 0.2 lbs for easy handling and shipping.
VacuFlush and Sealand toilets use a vacuum-assisted flush system. The flush ball must form an airtight seal against the bowl's ceramic or plastic seat every time it closes -- if the ball surface is scratched, warped, or the rotor shaft is worn, that vacuum seal breaks down. Symptoms include:
Replacing the full assembly (rather than just the ball) addresses all of these failure points at once and is the approach recommended for any toilet showing multiple symptoms.
This assembly is compatible with Sealand and VacuFlush toilet models that use either metal or plastic foot pedals. The foot pedal style does not affect flush ball fitment -- the assembly interfaces with the rotor shaft regardless of pedal material. If you are unsure whether your toilet uses this assembly, cross-reference your toilet model number against the confirmed fitment list below.
Replacing the flush ball assembly is a straightforward DIY repair that typically requires no special tools beyond a screwdriver. General procedure: