Dometic RV Toilet Seal Kit - Fits 300/310/320/500 Series - Part# 385311770

DometicSKU: 385311770
Added to catalog: March 10, 2026
Last product update: June 6, 2026 at 2:20 AM

Sale price$98.92 Regular price$157.28
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In stock (4 units), ready to be shipped
FREE Delivery Estimate June 9 – June 12
1-Hour Cancellation Window

1-Hour Cancellation Window

You'll have 1 hour after placing your order to update your shipping address or cancel completely.

After that, we begin coordinating with our vendors to fulfill your order — at that point, cancellations and address changes usually aren't possible.

If you're unsure about anything, please reach out before ordering or cancel within the window.

The Dometic toilet seal kit is an essential maintenance component that restores the watertight seal between your RV toilet bowl and base. Over time, the original seals deteriorate from constant use, temperature changes, and chemical exposure, leading to leaks and odors. This genuine OEM kit includes all necessary seals and gaskets to return your Dometic toilet to factory performance.

Key Features

  • Complete seal kit with all gaskets and seals needed for toilet reassembly
  • Compatible with Dometic 300, 310, 320, and 500 series toilets
  • Genuine OEM Dometic parts—not aftermarket substitutes
  • Prevents water leaks and waste odors from escaping into your RV
  • Restores original factory seal integrity
  • Includes instruction guide for proper installation

Technical Specifications

Part Number 385311770
Fits Models Dometic 300, 310, 320, 500 Series
Kit Contents Toilet bowl seals, base gaskets, and mounting hardware
Material Rubber and neoprene compounds
OEM Status Genuine Dometic OEM part

Frequently Asked Questions

How do I know if my toilet seal kit needs replacement?

Signs include water pooling around the toilet base, persistent sewage odors in your bathroom, or visible cracks in existing seals. If your toilet rocks slightly when you sit on it, the seals have likely failed.

Can I install this seal kit myself?

Yes, most RV owners can complete this installation with basic tools. You'll need to disconnect water and waste lines, remove the toilet bowl, and replace the seals. We recommend consulting your Dometic manual or contacting our support team for step-by-step guidance.

Will this kit work on my 2015 Dometic 310 toilet?

This kit is designed for 300, 310, 320, and 500 series toilets. We recommend verifying your exact model number on the toilet itself or in your RV documentation before ordering. Our expert team can help you confirm compatibility—contact us with your model details.

Why Choose Elkhart RV Parts

We specialize in hard-to-find Dometic RV replacement parts and ship directly from Elkhart, Indiana—the RV capital of the world. Every part is genuine OEM Dometic stock, and our expert support team is ready to help you find the exact seal kit your toilet needs.

100% Authentic OEM Parts

Factory-Fresh OEM Parts — the same brands installed in new RVs straight from Elkhart. Genuine, name-brand components made to order — never generic, never outdated. Sourced directly from the original RV manufacturers for perfect fit and factory-level quality.

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