The Dometic Cassette Toilet Tank Assembly (Part# 4450017346) is a complete replacement waste holding tank designed for Dometic 300, 310, and 320 series cassette toilets. This genuine OEM assembly includes the waste tank, seals, and discharge components, providing a complete solution when your existing cassette tank is damaged, cracked, or no longer sealing properly. Essential for RV owners who need to restore full functionality to their cassette toilet system.
Key Features
- Complete Tank Assembly: Includes waste holding tank with integrated seals and discharge spout for immediate installation
- Wide Compatibility: Direct replacement for Dometic 300, 310, and 320 series cassette toilets
- Genuine OEM Quality: Manufactured to Dometic's exact specifications for proper fit and reliable performance
- Sealed System: Features factory-installed seals and gaskets to prevent leaks and odors
- Easy Removal Design: Built-in handle and wheels for convenient removal and emptying
- Chemical Resistant: Durable construction withstands RV toilet chemicals and repeated use
Technical Specifications
| Part Number | 4450017346 |
| Product Type | Cassette Toilet Tank Assembly |
| Compatible Series | Dometic 300, 310, 320 |
| Assembly Type | Complete waste tank with seals |
| Manufacturer | Dometic |
Compatible Models
| Series | Description |
|---|---|
| 300 Series | Dometic Cassette Toilets |
| 310 Series | Dometic Cassette Toilets |
| 320 Series | Dometic Cassette Toilets |
Frequently Asked Questions
Does this include the toilet bowl or just the waste tank?
This is the complete cassette waste tank assembly only - the removable holding tank portion that slides out from underneath the toilet. It does not include the toilet bowl or seat assembly.
How do I know if my cassette tank needs replacement?
Common signs include visible cracks in the tank body, persistent odors even after cleaning, leaking around seals when the tank is full, or damage to the discharge spout. If seals alone don't solve leaking issues, the tank assembly may need replacement.
Will this fit my Dometic cassette toilet?
This tank assembly is designed for Dometic 300, 310, and 320 series cassette toilets. Check your toilet model number (usually found on a label near the bowl or in your RV manual) to confirm compatibility before ordering.
Can I use my existing blade and seals with this new tank?
This assembly comes with factory-installed seals and discharge components. While you may be able to reuse some external components, we recommend using the included seals for best performance and leak prevention.
Why Choose Elkhart RV Parts?
At Elkhart RV Parts, we specialize in hard-to-find Dometic replacement parts that keep your RV systems running smoothly. Located in Elkhart, Indiana - the RV Capital of the World - we understand the importance of getting the right part quickly. We stock genuine OEM Dometic components and provide expert support to help you identify exactly what you need. Fast shipping and knowledgeable customer service ensure you're back on the road with confidence.
| Brand | Dometic |
|---|---|
| Product type | Cassette Toilet Tank Assembly |
| Part number | 4450017346 |
| Compatible models | 300/310/320 Series |
| Component type | Waste Tank |
| Oem | true |
| Installation type | Slide-out Cassette |
| Category | Service 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.