Dometic 310/311 Toilet Seat | 385311646 | White | Plastic

Refresh your Dometic 310 or 311 Series RV toilet with the Dometic 385311646 Seat and Lid in white. This genuine Dometic OEM replacement features durable polypropylene construction with a clean white finish — the straightforward, cost-effective solution for refreshing a damaged, worn, or yellowed 310/311 Series toilet seat without paying for premium upgrades you don't need.

For Dometic 310 and 311 Series Toilets

The 385311646 is designed as a basic seat and lid replacement for Dometic 310 and 311 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 310/311 Toilet?

Worth knowing: the Dometic 300 Series (including the 310 and 311) is out of production and has been replaced by the Dometic 400 Series. The 385311646 seat fits your existing 310/311 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 seat will keep your existing 310/311 in service longer at a budget-friendly price point.

Standard Polypropylene Plastic Construction

The 385311646 is the basic plastic seat option for the 310/311 Series:

• Strong, lightweight polypropylene plastic — durable for daily RV use
• White finish — clean, bright aesthetic that complements white Dometic toilets
• Easy to clean — smooth surface releases waste and cleaning solutions effortlessly
• Cost-effective alternative to premium wood or enameled seat options
• Drop-in replacement for the original seat

Need the Bone Version Instead?

This seat is the white variant. If your existing toilet is bone-colored or you prefer a warmer aesthetic, see the Dometic 385311647 Seat and Lid — Bone. Same plastic construction and same 310/311 fitment — just bone color instead of white. Pick by your existing toilet's color.

Want a Premium Upgrade Instead?

If you'd prefer a more refined daily experience with slow-close hinges and residential wood construction, consider upgrading to the Dometic 385312075 Slow-Close Wood Toilet Seat — White. Same white color and same 310/311 fitment, but with:

• Slow-close hinge — quietly closes with a tap instead of slamming
• Wood construction — sturdier, more residential feel

This 385311646 is the right pick when you want a straightforward basic replacement at a budget price; the 385312075 is the right pick when you want the residential-feel upgrade.

When to Replace Your Toilet Seat

Common reasons to swap in the 385311646:

• Existing seat is cracked, chipped, or damaged
• Loose, broken, or worn hinges
• Yellowed or stained surface that no longer cleans up
• Cost-effective refresh as part of bathroom updating
• Routine wear after years of daily use

Complete Kit with Mounting Hardware

The 385311646 ships as a complete assembly:

• Seat
• Cover (lid)
• Mounting hardware package

No need to source separate hardware — drop in the new assembly and you're done.

Dimensions for Fitment Verification

Before ordering, verify the 385311646 will fit your toilet bowl:

• Seat hole inside diameter: 8-9/16" × 10-1/16"
• Overall seat outside dimensions: 14-9/16" × 16"
• Bolt hole spacing: 5-1/2" center to center

Easy Installation

The 385311646 is engineered for quick, straightforward installation:

• Mounting hardware package included
• Drop-in fit for 310/311 Series toilet bowls
• No specialty tools required

Genuine Dometic OEM Replacement

As a Dometic factory replacement part, the 385311646 is built to original specifications for a precise drop-in fit on compatible 310 and 311 Series toilets.

Key Features

• Genuine Dometic OEM seat and lid
• For Dometic 310 and 311 Series toilets
• Polypropylene plastic construction — strong, lightweight, durable
• White finish — clean, bright aesthetic
• Easy to clean — smooth, non-porous surface
• Complete kit — seat, cover, and mounting hardware included
• Cost-effective basic replacement option
• Overall dimensions: 14-9/16" × 16"
• Bolt hole spacing: 5-1/2"
• Lightweight: 1.55 lbs

What's Included

• (1) Seat and Cover
• (1) Mounting Hardware Package

Specifications

• Brand: Dometic
• Part Number: 385311646
• Type: Replacement Seat and Lid
• Compatible Models: Dometic 310 Series, 311 Series toilets
• Material: Polypropylene Plastic
• Color: White
• Closing Type: Standard close
• Seat Hole ID: 8-9/16" × 10-1/16"
• Overall Seat OD: 14-9/16" × 16"
• Bolt Hole Spacing: 5-1/2" center to center
• Net Weight: 1.55 lbs
• Gross Weight: 2.55 lbs
• Color Variant Available: Bone (Dometic 385311647)
• Upgrade Variant Available: White slow-close wood (Dometic 385312075 — for 310/311 Series)
• Modern Toilet Successor: Dometic Complete 410 (replaces out-of-production 310/311)