Dometic 385311009 Toilet Seal Kit – Replacement Bowl Seal for Dometic 3000 & 4000 Series RV Toilets

Restore Proper Flush Performance and Stop Water Leaks

The Dometic 385311009 Toilet Seal is a genuine OEM replacement seal designed to restore proper sealing performance between the toilet bowl and base on select Dometic RV toilets. If your toilet is leaking water, failing to hold water in the bowl, allowing odors to escape, or showing signs of a worn seal, replacing the seal is often the quickest and most cost-effective repair.

This replacement seal is specifically designed for Dometic 4410FS, 3410, 3010, 3110, 3210, 3310, and 4310 Series toilets equipped with a plug-in style base.

Installing a new OEM seal helps restore proper bowl water retention, improves flush performance, and helps eliminate unwanted holding tank odors from entering the RV.

Common Problems This Seal Fixes

• RV toilet won't hold water in the bowl
• Water slowly leaks out of the bowl
• Sewer odors coming from the toilet
• Worn, cracked, or damaged toilet seal
• Poor flush performance
• Toilet seal leaking between bowl and base
• Aging rubber seal causing water loss

Features & Benefits

• Genuine Dometic OEM replacement part
• Restores proper bowl water retention
• Helps eliminate black tank odors entering the RV
• Designed for plug-in style toilet bases
• Direct replacement for worn or damaged seals
• Improves toilet flushing performance
• Helps prevent water loss from the bowl
• Easy maintenance item for Dometic RV toilets
• Maintains proper sanitation system operation

Specifications

• Manufacturer: Dometic
• Part Number: 385311009
• Product Type: Toilet Seal
• Application: Bowl/Base Seal Replacement
• Style: Plug-In Base Design
• Material: Rubber
• Color: Black
• Quantity: Single
• OEM Replacement: Yes

Fits These Dometic Toilet Models

Compatible with the following Dometic RV toilet models equipped with a plug-in style base:

• Dometic 3010 Series
• Dometic 3110 Series
• Dometic 3210 Series
• Dometic 3310 Series
• Dometic 3410 Series
• Dometic 4310 Series
• Dometic 4410FS Series

Why Replace Your Toilet Seal?

One of the most common causes of an RV toilet that won't hold water is a worn or damaged bowl seal. Over time, mineral deposits, chemicals, and normal wear can cause the seal to lose flexibility and prevent it from sealing properly.

Replacing the Dometic 385311009 seal can:

• Restore water retention in the bowl
• Improve flushing performance
• Reduce unwanted odors
• Extend the life of your toilet
• Prevent more expensive repairs

Frequently Asked Questions

What are the symptoms of a bad RV toilet seal?

Common symptoms include water leaking from the bowl, the toilet failing to hold water, unpleasant odors from the black tank, and poor flush performance.

Will this fix a toilet that won't hold water?

In many cases, yes. A worn seal is one of the most common causes of water slowly draining from the toilet bowl.

Is this a genuine Dometic part?

Yes. The 385311009 is a genuine OEM Dometic replacement seal.

Does this fit all Dometic toilets?

No. This seal is designed specifically for select Dometic 3000 and 4000 Series toilets with a plug-in style base.

How often should a toilet seal be replaced?

Seal life varies depending on usage and maintenance, but replacement is recommended whenever the toilet no longer holds water properly or the seal becomes worn or damaged.

What's Included

• Dometic 385311009 Toilet Seal
• Genuine OEM Dometic Replacement Component