TeegRoow RV Toilet Seal & 3" Socket Floor Flange Kit for Dometic 300/310/320 — Complete Leak-Resistant Repair

TeegRoow's RV toilet seal and 3" socket floor flange kit restores a tight, leak-resistant connection for Dometic 300, 310 and 320 RV toilets.

When an RV toilet base leaks, smells, or becomes wobbly, the culprit is often worn seals or a damaged flange. This complete kit replaces the socket floor flange and both base and flush seals with parts designed to match Dometic models exactly, including hardware required to secure the toilet to the floor. The components are molded from heavy-duty ABS plastic and high-quality rubber to resist corrosion and maintain a long-lasting, odor-blocking seal.

How do I know this kit fits my Dometic 300/310/320 toilet?

The kit is engineered specifically to replace Dometic part numbers 385345892 (flange), 385311658 (flush seal), and 385311652 (base seal). It has the correct 3" socket diameter and bolt spacing used on those toilet models, so it installs without modifying the toilet or floor. If your OEM parts match those numbers or your flange measures 3" socket, this kit is a direct fit.

• Direct replacement for Dometic 300, 310, 320 component numbers
• 3" socket floor flange to match original plumbing diameter
• Standard bolt spacing and included hardware for bolt alignment

What exactly is included in the complete seal and flange repair kit?

The kit provides everything needed to remove and replace the existing flange and seals in one visit, so you won’t have to hunt for parts. Inside the package are the 3" socket floor flange, a flush ball seal, a base seal, two decorative bolt caps, two nuts, two washers, two brass bolts, four screws and four expansion anchors. These parts make the installation straightforward and ensure a tidy, secure finish.

• 1x 3" socket floor flange (ABS plastic)
• 1x flush ball seal (rubber) and 1x base seal (rubber)
• All mounting hardware: bolts, nuts, washers, screws, anchors, bolt caps

How durable and odor-resistant are the materials?

The flange is formed from heavy-duty ABS plastic to resist cracking and corrosion from moisture and cleaning products, while the seals use resilient rubber compounds that compress to form a reliable gasket. Together they block leaks and limit odors without frequent replacement. The construction is selected for long-term RV use where vibration and movement are common.

• ABS flange resists corrosion, cracking, and UV exposure
• Rubber seals compress to maintain a water- and odor-resistant barrier
• Brass bolts for corrosion-resistant fastening in marine/RV environments

Is installation difficult and what do I need to do it right?

Installation is designed to be achievable by most DIYers in a short afternoon using basic hand tools. The flange has a clear "THIS SIDE DOWN" orientation marking, and the kit includes anchors and screws matched to the flange. Remove the old parts, clean the mounting area, seat the new seals, and secure the flange and toilet with the supplied hardware for a leak-proof setup.

• Clear orientation marking for correct flange placement
• Includes anchors, screws, washers and brass bolts for secure mounting
• Tools commonly required: screwdriver, wrench, caulk for final sealing (optional)

Who is this for: RV owners and technicians who need a reliable, OEM-compatible repair to stop leaks, eliminate odors, and restore a secure toilet fit on Dometic 300, 310, and 320 units. It suits travelers who prefer a complete, single-package solution with corrosion-resistant parts and straightforward installation hardware, whether you are doing a routine maintenance refresh or repairing a failed seal in the field.