The Dometic toilet tank cap assembly is the sealed closure component for your RV's black water holding tank. This no-vent version is designed for Dometic 300, 310, and 320 series toilets, providing a secure, leak-free seal that prevents odors and waste gases from escaping into your RV. If your cap is cracked, missing, or no longer seals properly, replacing it is essential for sanitary operation.
Key Features
- No-vent design — sealed closure prevents odor escape and maintains tank integrity
- Compatible with Dometic 300, 310, and 320 series toilet systems
- Durable plastic construction engineered for RV waste tank environments
- Direct OEM replacement — exact fit and function
- Simple installation — no special tools required
- Prevents backflow and contamination of fresh water systems
Technical Specifications
| Specification | Details |
|---|---|
| Part Number | 4471003483 |
| Compatibility | Dometic 300, 310, 320 Series Toilets |
| Vent Type | No Vent (Sealed) |
| Material | Durable Plastic |
| Type | Tank Cap Assembly |
Frequently Asked Questions
Q: How do I know if my toilet tank cap needs replacement?
A: Replace your cap if you notice cracks, persistent odors coming from the toilet area, visible leaks around the tank, or if the cap no longer seals tightly when closed. A worn cap compromises your entire waste system.
Q: Will this no-vent cap work on my older Dometic toilet?
A: This cap is specifically designed for Dometic 300, 310, and 320 series toilets. Check your toilet model number before ordering. Using the wrong cap can result in leaks or improper tank function.
Q: Is installation difficult?
A: No. The cap assembly simply screws onto your tank. Turn off water to the toilet, empty the tank if possible, unscrew the old cap, and thread the new one on hand-tight. No special tools or plumbing experience needed.
Why Elkhart RV Parts
Elkhart RV Parts specializes in hard-to-find Dometic replacement components for RV owners who need exact OEM parts. We ship from Elkhart, Indiana — the RV capital of the world — and stand behind every genuine Dometic part with expert support. When your RV's systems matter, trust the specialists.
| Brand | Dometic |
|---|---|
| Product type | Toilet Tank Cap Assembly |
| Part number | 4471003483 |
| Vent function | No |
| Compatible series | 300/310/320 |
| Toilet type | Gravity Flush |
| Oem | Yes |
| Product condition | New |
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.