The Dometic Twist & Waste III Replacement Cap Kit keeps your RV's waste holding tank system sealed and functioning properly. This cap assembly is essential for the 28HTS model and prevents odors, leaks, and contamination of your black water or gray water tanks. If your existing cap is cracked, worn, or no longer seals tightly, this genuine OEM replacement restores your system to factory specifications.
Key Features
- Genuine OEM Dometic replacement cap for Twist & Waste III systems
- Designed specifically for 28HTS model compatibility
- Secure twist-lock design prevents accidental opening during travel
- Durable plastic construction resists UV damage and chemical degradation
- Complete kit includes all necessary components for installation
- Maintains proper tank ventilation while preventing odor escape
Technical Specifications
| Specification | Details |
|---|---|
| Part Number | 385310645 |
| System Type | Twist & Waste III |
| Compatible Model | 28HTS |
| Material | Durable Plastic |
| Kit Type | Complete Cap Assembly |
Frequently Asked Questions
Q: How do I know if my Twist & Waste III cap needs replacement?
A: Signs include visible cracks or damage to the cap, difficulty twisting it open or closed, persistent tank odors even after emptying, or leaking around the cap seal. If your cap no longer creates an airtight seal, replacement is necessary.
Q: Is this cap kit easy to install myself?
A: Yes. The Twist & Waste III cap simply twists off the existing tank assembly and the new one twists back on. No tools or special skills are required—most RV owners complete the installation in under five minutes.
Q: Will this cap work with other Dometic waste tank models?
A: This cap is specifically designed for the 28HTS model with the Twist & Waste III system. Using the correct part ensures proper fit and function. Check your tank model before ordering to confirm compatibility.
Why 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. This is a genuine OEM Dometic part backed by our expert support team. When you need the exact replacement for your waste management system, we have it in stock and ready to ship.
| Brand | Dometic |
|---|---|
| Product type | Replacement Cap Kit |
| Model compatibility | 28HTS |
| Part number | 385310645 |
| Length | 22 inches |
| Design type | Ventless |
| Key features | Leak-resistant sealOdor preventionOEM partSecure fit |
| Application | RV waste system/holding tanks |
| Installation | Direct replacement |
| 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.