RV Toilet Valve Kit for Dometic 300 301 310 311 320 321 Toilets
RV Toilet Valve Kit for Dometic 300-321 Toilets, valve assembly, seal, hose clamp, washers, screens and screws.
RV Toilet Valve Kit for Dometic 300-321 Toilets, product dimensions diagram with valve, seal, clamp and hardware
RV Toilet Valve Kit for Dometic 300 301 310 311 320 321 Toilets, package contents shown
RV Toilet Valve Kit for Dometic 300 301 310 311 320 321 Toilets, durability features infographic
RV Toilet Valve Kit for Dometic 300 301 310 311 320 321 Toilets, compatibility graphic with valve, seal and hardware
RV Toilet Valve Kit for Dometic 300-321 Toilets, four-step installation diagram showing valve and water line steps
RV Toilet Valve Kit for Dometic 300 301 310 311 320 321 Toilets, heavy-duty rubber seal close-up
RV Toilet Valve Kit, close-up with enhanced durability callouts for crack resistance, leak resistance, hardware, and freeze p
385311641 RV Toilet Water Valve Kit, labeled views showing screw slots, water inlet, hose clamp, and mesh filter
RV Toilet Valve Kit for Dometic 300 301 310 311 320 321 Toilets, infographic showing RV toilet and valve kit parts
RV Toilet Valve Kit for Dometic 300-321 Toilets shown with valve, black seal, clamps, washers and screws
RV Toilet Valve Kit for Dometic 300-321 Toilets, valve assembly, seal, hose clamp, washers, screens and screws.
RV Toilet Valve Kit for Dometic 300-321 Toilets, product dimensions diagram with valve, seal, clamp and hardware
RV Toilet Valve Kit for Dometic 300 301 310 311 320 321 Toilets, package contents shown
RV Toilet Valve Kit for Dometic 300 301 310 311 320 321 Toilets, durability features infographic
RV Toilet Valve Kit for Dometic 300 301 310 311 320 321 Toilets, compatibility graphic with valve, seal and hardware
RV Toilet Valve Kit for Dometic 300-321 Toilets, four-step installation diagram showing valve and water line steps
RV Toilet Valve Kit for Dometic 300 301 310 311 320 321 Toilets, heavy-duty rubber seal close-up
RV Toilet Valve Kit, close-up with enhanced durability callouts for crack resistance, leak resistance, hardware, and freeze p
385311641 RV Toilet Water Valve Kit, labeled views showing screw slots, water inlet, hose clamp, and mesh filter
RV Toilet Valve Kit for Dometic 300 301 310 311 320 321 Toilets, infographic showing RV toilet and valve kit parts
RV Toilet Valve Kit for Dometic 300-321 Toilets shown with valve, black seal, clamps, washers and screws

RV Toilet Valve Kit for Dometic 300 301 310 311 320 321 Toilets

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$14.04
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RV Toilet Valve Kit for Dometic 300 301 310 311 320 321 Toilets

Key Features

  • RV toilet repair kit with water valve 385311641 and flush ball seal 385311658.
  • The valve regulates water flow into the bowl during flushing.
  • The flush ball seal sits under the flush ball to help hold water in the bowl between uses.
  • Valve body is molded from thermoplastic ABS with a reinforced structure designed to resist cracking under daily pedal pressure and winter storage.
  • Rubber flush ball seal maintains elasticity for a reliable bowl seal.
  • Barb inlet and outlet connections.
  • Designed for pedal-flush RV toilets used in campers, travel trailers, motorhomes, and marine applications.
  • Includes 1 water valve assembly, 1 flush ball seal, 1 hose clamp, 2 mounting screws, 2 nuts and washers, 2 caps, and 2 stainless steel inlet screens.

Replaces / Cross-Reference Part Numbers

  • 385311641 — RV toilet water valve.
  • 385311658 — flush ball seal.

Compatibility & Fitment

This repair kit fits Dometic and Sealand pedal-flush toilets in the 300, 301, 310, 311, 320, and 321 series. Check the existing valve, seal, and mounting arrangement against the toilet before ordering.

When to Replace

  • Water seeps from the valve body or hose connection.
  • The bowl continues running after the pedal is released.
  • The flush is weak or slow.
  • The pedal or button feels loose.
  • Odors rise from the holding tank because the flush ball seal no longer holds water.
  • The valve or seal shows cracking, flattening, hardening, or other wear.

Installation Tips

  1. Shut off the water supply and drain the line.
  2. Remove the old valve and lift out the worn flush ball seal.
  3. Push the replacement valve into position and tighten the two mounting screws evenly.
  4. Slide the water pipe onto the top barb and secure the water line with the hose clamp.
  5. Run a test flush and inspect the valve, hose joint, and fittings for leaks.

Installation typically takes about 15 minutes with basic hand tools. The kit includes lifetime protection for defects or issues.

385311641 RV toilet water valve kit shown with a white RV toilet, valve, seal, and stainless hardware
Package includes water valve assembly, hose clamp, 2 inlet screens, flush seal, 2 washers and 2 screws.
RV Toilet Valve Kit for Dometic 300 301 310 311 320 321 Toilets 3
RV Toilet Valve Kit for Dometic 300 301 310 311 320 321 Toilets 4
RV Toilet Valve Kit for Dometic 300 301 310 311 320 321 Toilets 5
RV Toilet Valve Kit for Dometic 300 301 310 311 320 321 Toilets 6
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KEEP YOUR RV READY FOR ADVENTURE

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Compatible Models

Locate the model number of your appliance or equipment on the manufacturer's label and use it to check compatibility before ordering

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FAQs

This valve kit is designed for Dometic 300, 301, 310, 311, 320, and 321 RV toilets with a pedal-flush water valve arrangement.
The replacement part number is 385311641. Use the number on your existing water valve and confirm the toilet model before ordering.
Common symptoms include water continuing to run after the pedal is released, water leaking around the valve or inlet connection, weak water flow into the bowl, or a valve that does not open when the flush pedal is pressed.
Installation is generally straightforward for a basic RV plumbing repair. Shut off the water supply, depressurize the system, disconnect the inlet and outlet hoses, transfer any required fittings, and secure the replacement valve. Allow about 20 to 40 minutes, depending on access and the condition of the hose connections.
Inspect the inlet and outlet hoses, barb connections, clamps, pedal linkage, and sealing surfaces for cracks, mineral buildup, or damage. Replace worn clamps or damaged hose sections, and flush debris from the supply line before connecting the new valve.
Drain and winterize the RV toilet and water lines before freezing temperatures. Do not leave pressurized water in the valve during storage, and check the hose connections for proper seating when the system is brought back into service.