2 Set RV Toilet Valve Replacement Kit

Vypart’s 2 Set RV Toilet Valve Replacement Kit replaces the Dometic 385311641 water valve and 385311658 flush ball seals to restore a leak-free, reliable pedal-flush toilet.

If your Sealand Dometic 300/301/310/311/320/321 pedal-flush toilet runs, drips, or smells, this two-kit pack supplies the parts needed for a complete valve rebuild without extra trips to the hardware store. Each kit includes a water valve, flush ball seal, hose clamp, two screws with washers, and two stainless-steel mesh filters—everything to replace the worn components that cause most RV toilet failures.

How will installing this kit stop constant running or leaks?

The kit replaces the primary valve and the high-grade rubber flush ball seal that stops water flow when the toilet is idle. The modern seal compound and precision-threaded valve mating prevent the gaps that let water escape.

• Direct OEM-fit 385311641 valve replacement for consistent sealing
• 385311658 flush ball seal made from durable rubber compound
• Precision connections and ultrasonic-welded seams to reduce leak paths
• Included mesh filters prevent debris-caused valve sticking

Is this kit compatible with my Dometic RV toilet model?

This pack is designed for Sealand Dometic pedal-flush models 300, 301, 310, 311, 320, and 321. It directly replaces OEM numbers 385311641 (valve) and 385311658 (seal).

• Direct OEM replacements for listed model numbers only
• Not compatible with Dometic models 210, 510, or unlisted units
• Always check the model stamped on your toilet or consult your manual before ordering

How difficult is installation and what tools do I need?

Most users can complete one kit installation in 10–15 minutes using only a Phillips screwdriver. No plumbing license or specialty tools are required; the kit arrives with mounting screws and a clamp so you won’t need extra parts.

• Typical install time: 10–15 minutes per kit
• Only a Phillips screwdriver required; hoses and clamps included
• Follow online video guides or the included installation images for visual steps

Will these parts last in cold or heavy-use conditions?

The valve body uses glass-fiber-reinforced thermoplastic and ultrasonic welding at critical seams for improved freeze and fatigue resistance. Filters and hardware are corrosion-resistant, designed for prolonged service in mobile and marine environments.

• Reinforced thermoplastic resists freeze cracking and wear
• Stainless-steel mesh filters reduce debris wear on moving parts
• Factory-tested components meet or exceed OEM-level durability

Who this is for: RV owners, DIYers, and fleet maintenance teams who need a fast, reliable fix for running toilets or valve leaks on supported Sealand Dometic pedal-flush models. If you want an OEM-compatible replacement that reduces service calls and gets your toilet functioning like new, this two-kit Vypart pack provides the parts and hardware for two full valve rebuilds.