Dometic 300 Series Toilet Seat Repair Kit | 385311930 | White

Refresh the visible parts of your Dometic 300 Series RV toilet with the Dometic 385311930 Seat and Cover Repair Kit in white. This genuine Dometic OEM kit is the cost-effective solution for refreshing just the seat and cover portions of your 300 Series toilet — when your existing hinge frame is still in good condition and only the seat and lid need replacement. The right pick when you want to update the look and feel of your toilet without paying for hardware you don't need.

⚠️ Repair Kit — Seat and Cover ONLY

Important fitment detail: The 385311930 is a seat and cover repair kit only. It does NOT include:

• The hinge frame — the part with the mounting holes that bolts to the toilet bowl
• The cover/hinge attachment assembly

If your existing hinge frame is damaged, cracked, missing, or you're starting fresh, the 385311930 is NOT the right kit — you'd need a more complete seat assembly with the hinge frame included. If your existing hinge frame is intact and serviceable, the 385311930 is a cost-effective way to refresh just the visible seat and cover parts.

Verify your existing hinge frame is in good condition before ordering this repair kit.

For Dometic 300 Series Toilets

The 385311930 is designed as a seat-and-cover repair kit for Dometic 300 Series RV toilets. Verify your existing toilet model on the manufacturer label before ordering — Dometic seat assemblies are not interchangeable across all toilet model lines.

⚠️ Have an Older 300 Series Toilet?

Worth knowing: the Dometic 300 Series is out of production and has been replaced by the Dometic 400 Series. The 385311930 seat and cover kit fits your existing 300 Series toilet just fine — but if you're ever ready for a full toilet replacement rather than just a seat refresh, the modern successor is the Dometic Complete 410 RV Toilet — the new-generation compact porcelain replacement for 300 Series toilets.

For now, this kit will keep your existing 300 Series in service longer at a budget-friendly price point.

When the 385311930 Repair Kit Is the Right Choice

Good reasons to choose the repair kit:

• Your seat or cover is cracked, chipped, or damaged
• Surface is yellowed or stained beyond cleaning
• Your existing hinge frame is intact and works fine
• You want a cost-effective refresh without paying for parts you don't need
• Cosmetic update while preserving the working mounting hardware

White Finish

The 385311930 features a clean white finish — bright and crisp, complementing modern RV bathroom palettes and brightening the overall space compared to bone or off-white seats.

Dimensions for Fitment Verification

Before ordering, verify the 385311930 will fit your existing toilet:

• Seat hole inside diameter: 8-9/16" × 10-1/16"
• Overall seat outside dimensions: 14-9/16" × 16"

What's Included

• (1) Seat
• (1) Cover (lid)
• Mounting bolts

Not included: Hinge frame with mounting holes (this is a seat repair kit only — the hinge frame must already be serviceable on your existing toilet).

Genuine Dometic OEM Replacement

As a Dometic factory replacement part, the 385311930 is built to original specifications for a precise drop-in fit on compatible 300 Series toilets where the hinge frame is in good condition.

Key Features

• Genuine Dometic OEM seat and cover repair kit
• For Dometic 300 Series toilets
• White finish — clean, bright aesthetic
• Repair kit configuration — seat and cover only
• Does NOT include hinge frame — requires existing serviceable hinge
• Cost-effective refresh when hinge is still intact
• Mounting bolts included
• Seat hole ID: 8-9/16" × 10-1/16"
• Overall seat OD: 14-9/16" × 16"
• Lightweight: 1.45 lbs

Specifications

• Brand: Dometic
• Part Number: 385311930
• Type: Replacement Seat and Cover Repair Kit
• Configuration: Seat and cover only (NOT a full assembly — hinge frame NOT included)
• Compatible Models: Dometic 300 Series toilets
• Color: White
• Seat Hole ID: 8-9/16" × 10-1/16"
• Overall Seat OD: 14-9/16" × 16"
• Net Weight: 1.45 lbs
• Gross Weight: 2.30 lbs
• Modern Toilet Successor: Dometic Complete 410 (replaces out-of-production 300 Series)