Dometic Discharge Tube Kit - Fits 8600/8900 Series Toilets - Part# 385312149

DometicSKU: 385312149
Added to catalog: March 10, 2026
Last product update: June 6, 2026 at 12:46 AM

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In stock (10 units), ready to be shipped
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The Dometic Discharge Tube Kit (Part# 385312149) is a critical replacement component for Dometic 8600 and 8900 series RV toilets. This tube connects the toilet bowl to the holding tank, ensuring proper waste discharge and preventing leaks. If you're experiencing leaks around the base of your toilet or notice cracks in the existing discharge tube, this OEM replacement kit restores your toilet to factory specifications.

Key Features

  • Direct OEM Replacement: Engineered specifically for Dometic 8600 and 8900 series toilets with exact factory specifications
  • Complete Kit: Includes discharge tube and necessary mounting hardware for straightforward installation
  • Durable Construction: Built with high-quality materials designed to withstand RV toilet waste discharge demands
  • Leak Prevention: Proper seal design prevents odors and leaks between toilet and holding tank
  • Easy Installation: Designed for DIY replacement with basic hand tools

Technical Specifications

Part Number 385312149
Compatible Series Dometic 8600 & 8900 Series Toilets
Component Type Discharge Tube Assembly Kit
Installation Type Direct Replacement

Compatible Models

Series Models
8600 Series Dometic 8600 Gravity Discharge Toilets
8900 Series Dometic 8900 Gravity Discharge Toilets

Frequently Asked Questions

How do I know if I need to replace my discharge tube?

Common signs include water or waste leaking around the toilet base, visible cracks in the tube, persistent odors even after cleaning, or difficulty flushing. If you notice any of these symptoms, inspect the discharge tube for damage or deterioration.

Can I install this discharge tube kit myself?

Yes, most RV owners with basic mechanical skills can replace this component. You'll need to remove the toilet from the floor, disconnect the old tube, install the new tube with the included hardware, and reseal the toilet base. Always turn off water supply and empty the holding tank before beginning work.

Will this fit both white and bone-colored Dometic toilets?

Yes, this discharge tube kit is compatible with all color variations of Dometic 8600 and 8900 series toilets. The tube is a functional component located beneath the toilet bowl and doesn't need to match the toilet's exterior color.

What's included in this kit?

The kit includes the discharge tube assembly and necessary mounting hardware required for installation. You may need to purchase a new wax ring or toilet seal separately if your existing seal is damaged during removal.

Why Choose Elkhart RV Parts?

At Elkhart RV Parts, we specialize in hard-to-find Dometic RV toilet components like this discharge tube kit. Located in Elkhart, Indiana — the RV Capital of the World — we understand the urgency of getting your RV bathroom back in working order. We stock genuine OEM Dometic parts and ship fast so you can get back on the road. Our team of RV parts experts is available to help you identify the right components and answer installation questions. When you need authentic Dometic replacement parts, trust the specialists at Elkhart RV Parts.

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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