Dometic 385311164 1/2" Sealing Grommet for Traveler Lite, 500 Series, and VacuFlush Models

Dometic 385311164 – 1/2" Sealing Grommet

OEM Water Line Sealing Grommet for Traveler Lite, 500 Series & VacuFlush RV/Marine Toilets

The Dometic 385311164 1/2" Sealing Grommet creates a watertight, vibration-resistant seal where the fresh-water supply line enters your toilet assembly. This OEM rubber grommet is essential for preventing leaks, backflow, and water seepage in Traveler Lite, 500 Series, and VacuFlush models. If you notice moisture, drips, or looseness around the water inlet line, replacing this grommet is the correct solution.

Features & Benefits

• Genuine OEM Dometic/Sealand sealing grommet
• Creates a tight, long-lasting seal around 1/2" water inlet connections
• Prevents drips, leaks, and moisture intrusion at the water entry point
• Helps maintain proper vacuum/water integrity for VacuFlush and 500 Series systems
• Durable, chemical-resistant rubber construction
• Quick and easy replacement—no special tools required

Fits These Models

Compatible with:

• Traveler Lite Series
  • 110
  • 111
  • 210
• Dometic 500 Series Toilets
  • 510H
  • 511H
  • 510PS
  • 511PS
• Dometic VacuFlush Models
  • 508-509
  • 568
  • (select models using 1/2" inlet grommets)

Always confirm inlet size before ordering—this grommet fits 1/2" water line connections.

Common Issues Solved

Replacing the 385311164 grommet can fix:

• Water leaking around the toilet’s water supply entry
• Drips caused by a cracked, dry, or shrunken grommet
• Poor seal leading to air leaks (especially in VacuFlush systems)
• Vibrations causing water line movement
• Seepage that can damage flooring or toilet components

Replaces / Also Known As

• Dometic 385311164
• 1/2" Water Line Grommet
• Inlet Hose Sealing Bushing
• Sealand Water Supply Grommet
• RV/Marine Toilet Inlet Seal

What’s Included

• 1 OEM 1/2" sealing grommet
  (Order extras if servicing multiple toilets)

Installation Overview

1. Turn off the RV or marine water pump.
2. Disconnect the fresh-water supply line.
3. Remove the old grommet from the inlet opening.
4. Clean the surface area to ensure a proper seal.
5. Insert the new grommet firmly into the housing.
6. Reconnect water line and test for leaks.

Typical installation time: 5 minutes.

Frequently Asked Questions

Q: How do I know if I need this grommet?
If you see moisture, drips, or cracking around the water inlet, the grommet is worn and should be replaced.

Q: Does this grommet fit all VacuFlush toilets?
No—VacuFlush models use different configurations. This grommet fits models using 1/2" inlet seals.

Q: Is this an OEM part?
Yes—this is the genuine Dometic/Sealand replacement.

Q: Will this stop odor leaks?
For VacuFlush systems, an improperly sealed inlet can affect vacuum integrity—this grommet helps restore proper operation.