RV Toilet Seal and 3" Socket Floor Flange Kit for Dometic

TeegRoow's complete RV toilet seal and 3" socket floor flange kit replaces worn seals and flange parts on Dometic 300, 310, and 320 toilets to stop leaks and reduce odors.

Travel trailers and motorhomes depend on reliable seals and a sturdy flange where the toilet meets the floor. This kit is a full replacement package that includes the 3" socket floor flange, two toilet seals (flush ball seal and base seal), fasteners, decorative caps, and anchors — everything needed to restore a tight, corrosion-resistant connection between the toilet and waste outlet.

How will this kit stop leaks and smells in my RV bathroom?

The kit uses a properly shaped rubber base seal and a flush ball seal that recreate the original contact surfaces for a water- and odor-tight fit. The ABS flange resists corrosion and keeps the connection rigid so seals remain compressed and effective.

• Includes base seal (385311652) and flush ball seal (385311658) matched to Dometic parts
• ABS plastic flange (385345892) resists wear and deformation
• Complete fastener set ensures even compression and a consistent seal

Is the kit easy to install or do I need a plumber?

Designed for straightforward replacement, the components come labeled and include hardware and anchors for a secure fit. Basic tools and following the marked orientation (“THIS SIDE DOWN”) are all that’s typically required, so many RV owners can complete the job themselves.

• Clear orientation marking on flange for correct placement
• All nuts, washers, brass bolts, screws, and anchors are included
• Simple remove-clean-replace sequence; no special adapters needed

Will this fit my Dometic 300, 310, or 320 toilet exactly?

The kit is made to replace the original Dometic part numbers listed and matches the factory dimensions for Dometic 300/310/320 models. Using the matched seals and flange restores original fit and performance without modifying the toilet or floor opening.

• Direct replacements for parts 385345892, 385311658, 385311652
• Designed for the Dometic 300, 310, 320 toilet series
• No trimming or special adapters required when used as intended

What materials and durability can I expect from this repair kit?

The flange is molded from heavy-duty ABS for impact and corrosion resistance, while the seals are formulated rubber to maintain flexibility and compression over time. The included brass bolts and stainless-like fasteners minimize rusting where moisture is present.

• ABS flange for strength and long-term shape retention
• Rubber seals resist drying and cracking when installed correctly
• Brass bolts and durable hardware reduce corrosion risk under the toilet

Who this kit is for: RV owners, DIY maintenance enthusiasts, or fleet technicians who use Dometic 300/310/320 toilets and need a single purchase that restores the flange and both toilet seals. It’s ideal when you see leaks, persistent odors, or a loose toilet base and want a reliable, OEM-compatible solution without lengthy repairs.