This 3-in-1 repair kit is designed specifically for Dometic 300, 310, and 320 RV toilets, providing a complete solution for common wear issues. The set includes the 385345892 RV toilet floor flange with three socket connections, the 385311658 flush ball seal, and the 385311652 base seal gasket. Each component is crafted from durable rubber and plastic materials that resist cracking, shrinking, and deformation under the temperature fluctuations and moisture typical in recreational vehicle environments. The floor flange features three integrated socket openings that align perfectly with the Dometic toilet mounting bolts, simplifying replacement without requiring additional adapters. Its reinforced construction ensures a secure hold against the floor, preventing rocking or misalignment that can lead to leaks. The flush ball seal is molded from a flexible yet firm rubber compound that creates a watertight closure between the flush ball and the toilet bowl. Its precision fit minimizes friction while maintaining a reliable seal after each flush cycle. The base seal gasket sits between the toilet base and the floor, forming a barrier that stops wastewater from seeping underneath the fixture.

Made from a compressible elastomer, it conforms to slight surface irregularities for consistent contact. Installation of these parts requires no specialized tools, making it a straightforward task for RV owners with basic mechanical aptitude. The flange slides over the existing waste pipe and bolts down securely, while the flush ball seal snaps into place around the flush ball mechanism. The base gasket sits in the groove of the toilet base before the unit is lowered onto the flange. All components are pre-sized for the Dometic 300/310/320 models, eliminating the need for trimming or cutting. Regular replacement of these wear items helps maintain the toilet’s flushing efficiency and prevents odors from escaping through gaps. Priced affordably compared to OEM replacements, this kit offers a practical way to address multiple failure points at once. The materials used are formulated to withstand prolonged contact with water, cleaning chemicals, and waste materials without degrading. The flange’s socket design accommodates standard RV plumbing connections, and both seals resist hardening over time. Using these parts together ensures all vulnerable areas of the toilet seal system are refreshed simultaneously, reducing the likelihood of repeated repairs. For RV owners looking to restore their Dometic 300/310/320 toilet to reliable operation, this kit delivers a balanced combination of fit, durability, and value. It provides the essential components needed to eliminate leaks and improve the overall function of the toilet without requiring professional assistance. The straightforward design and direct compatibility make it a sensible choice for routine maintenance or targeted repairs.