2-Pack RV Toilet Valve Kit for Dometic 300 301 310 311 320 321
385311641 RV toilet valve kit, 2-pack shown with valves, screws, clamps, washers, springs, and black seals
385311641 2-Pack RV Toilet Valve Kit shows product dimensions with valve, seal, clamp, washers, screws and measurements
385311641 2-Pack RV Toilet Valve Kit, package contents shown with two valves, seals, clamps, screens, washers and screws
385311641 RV toilet valve kit feature graphic showing ABS plastic, mounting arm, screw threads, and steel filter
385311641 2-Pack RV Toilet Valve Kit, parts shown with Sealand 300, 310 and 320 toilet compatibility graphic
385311641 RV toilet valve kit showing four installation steps: insert valve, tighten screws, attach and clamp water line
385311641 2-Pack RV Toilet Valve Kit, heavy-duty rubber seal with close-up detail views
385311641 2-Pack RV Toilet Valve Kit, close-up with durability feature labels
385311641 RV toilet water valve kit diagram showing screw slots, stainless steel mesh filter, hose clamp, water inlet and out
385311641 2-Pack RV Toilet Valve Kit infographic showing an RV toilet, replacement valve, and common toilet issues
385311641 2-Pack RV Toilet Valve Kit, product graphic showing two valves, seals, clamps, screws, and washers
385311641 RV toilet valve kit, 2-pack shown with valves, screws, clamps, washers, springs, and black seals
385311641 2-Pack RV Toilet Valve Kit shows product dimensions with valve, seal, clamp, washers, screws and measurements
385311641 2-Pack RV Toilet Valve Kit, package contents shown with two valves, seals, clamps, screens, washers and screws
385311641 RV toilet valve kit feature graphic showing ABS plastic, mounting arm, screw threads, and steel filter
385311641 2-Pack RV Toilet Valve Kit, parts shown with Sealand 300, 310 and 320 toilet compatibility graphic
385311641 RV toilet valve kit showing four installation steps: insert valve, tighten screws, attach and clamp water line
385311641 2-Pack RV Toilet Valve Kit, heavy-duty rubber seal with close-up detail views
385311641 2-Pack RV Toilet Valve Kit, close-up with durability feature labels
385311641 RV toilet water valve kit diagram showing screw slots, stainless steel mesh filter, hose clamp, water inlet and out
385311641 2-Pack RV Toilet Valve Kit infographic showing an RV toilet, replacement valve, and common toilet issues
385311641 2-Pack RV Toilet Valve Kit, product graphic showing two valves, seals, clamps, screws, and washers

2-Pack RV Toilet Valve Kit for Dometic 300 301 310 311 320 321

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2-Pack RV Toilet Valve Kit for Dometic 300 301 310 311 320 321

Key Features

  • Includes 2 RV toilet water valve assemblies, model 385311641.
  • Includes 2 flush ball seals, model 385311658.
  • Also includes 2 hose clamps, 4 inlet screens, 4 screws, and 4 washers.
  • The water valve regulates water flow into the toilet bowl during flushing.
  • The flush ball seal sits beneath the flush ball to help retain water in the bowl between uses.
  • Valve construction uses thick thermoplastic ABS with a reinforced structure designed to resist cracking during regular pedal use and seasonal storage.
  • The flush ball seal uses a rubber compound designed to maintain elasticity.

Replaces / Cross-Reference Part Numbers

  • 385311641 RV toilet water valve assembly
  • 385311658 flush ball seal

Compatibility & Fitment

This valve kit fits Dometic and Sealand pedal-flush toilets in the 300, 301, 310, 311, 320, and 321 series. It is suitable for compatible toilets installed in campers, travel trailers, motorhomes, and marine applications. Check the existing valve, seal, and toilet model before ordering.

When to Replace

Replace the valve and seal when the toilet shows signs of a worn water valve or flattened flush ball seal, including:

  • Water leaking from the valve body or hose connection.
  • Water continuing to run after releasing the flush pedal.
  • A weak or slow flush.
  • A loose pedal button.
  • Odors entering the bowl from the holding tank.

Installation Tips

Installation takes about 15 minutes with basic hand tools. Shut off the water supply and drain the line before removing the old parts.

  1. Remove the old valve and lift out the worn flush ball seal.
  2. Press the replacement valve into position and tighten the two mounting screws evenly.
  3. Slide the water pipe onto the top port and secure the water line with the hose clamp.
  4. Install the replacement seal beneath the flush ball.
  5. Run a test flush and inspect the valve and hose connections for leaks.
385311641 RV toilet water valve kit shown with a toilet, replacement valves, seals, and stainless hardware
Package includes 2 water valve assemblies, 2 flush seals, 2 hose clamps, 4 washers, 4 screws and 4 inlet screens
2-Pack RV Toilet Valve Kit for Dometic 300 301 310 311 320 321 3
2-Pack RV Toilet Valve Kit for Dometic 300 301 310 311 320 321 4
2-Pack RV Toilet Valve Kit for Dometic 300 301 310 311 320 321 5
2-Pack RV Toilet Valve Kit for Dometic 300 301 310 311 320 321 6
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Compatible Models

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FAQs

This valve kit is designed for Dometic 300, 301, 310, 311, 320, and 321 pedal-flush RV toilets. Confirm the model number and valve mounting style before ordering, since similar Dometic toilets may use different valve assemblies.
The valve is identified by part number 385311641 and is supplied as a 2-pack, providing two replacement water valves.
Common symptoms include water continuing to run after the foot pedal is released, water leaking around the valve, weak or uneven water flow, or the bowl failing to hold water. A valve damaged by freezing may show cracking or leak as soon as the toilet is pressurized.
Installation is generally straightforward for someone familiar with RV plumbing. Shut off the water supply, drain pressure from the toilet, remove the existing valve and its connections, install the replacement with the seals seated correctly, and check for leaks. Basic hand tools are typically sufficient, and most installations take about 20–30 minutes.
Turn off the RV water pump and disconnect city-water pressure before starting. Inspect the supply hose, fittings, valve mounting area, and pedal mechanism for cracks, mineral buildup, or damage. Flush debris from the supply line and make sure the toilet is level and the replacement seals are clean and properly positioned.
Yes. Water trapped in the valve can freeze and expand, causing cracks or leaks. Winterize the RV by draining the toilet water supply and following the RV manufacturer’s antifreeze procedure before storage in freezing conditions.