The Dometic 385311111 is a 1-1/2" sealing grommet designed specifically for Dometic 300, 310, and 320 series RV toilets. This critical seal prevents water leaks between the toilet base and the floor flange, ensuring a watertight connection. If you're experiencing water seepage around your toilet base or notice the seal has deteriorated, this OEM replacement grommet restores proper function and prevents potential water damage to your RV floor.
Key Features
- Precision Fit: 1-1/2" diameter designed specifically for Dometic 300/310/320 series toilet installations
- Water-Tight Seal: Creates a reliable barrier between toilet base and floor flange to prevent leaks
- Durable Construction: Made from flexible, long-lasting rubber compound that resists compression set
- OEM Quality: Genuine Dometic replacement part engineered to exact factory specifications
- Easy Installation: Direct replacement for worn or damaged original grommet
- Essential Maintenance Part: Recommended replacement during toilet removal or when leaks are detected
Technical Specifications
| Part Number | 385311111 |
| Grommet Diameter | 1-1/2 inches |
| Material | Rubber compound |
| Application | Toilet base to floor flange seal |
| Manufacturer | Dometic |
Compatible Models
| Series | Models |
|---|---|
| 300 Series | Dometic 300 Series RV Toilets |
| 310 Series | Dometic 310 Series RV Toilets |
| 320 Series | Dometic 320 Series RV Toilets |
Frequently Asked Questions
How do I know if I need to replace this grommet?
Signs include water pooling around the toilet base after flushing, visible cracks or deterioration in the existing seal, or if you're removing the toilet for any maintenance. It's good practice to replace this seal whenever the toilet is removed from the floor flange.
What's the difference between this and a wax ring?
Unlike traditional household wax rings, this rubber grommet is specifically designed for RV applications where movement and vibration are constant factors. The rubber material maintains its seal better than wax in mobile environments and won't melt in high temperatures.
Can I reuse the old grommet if it looks okay?
It's not recommended. Once compressed, rubber seals lose their ability to create a proper water-tight seal. The small cost of a new grommet is worth the peace of mind and protection against potential water damage to your RV floor.
Do I need any special tools to install this grommet?
No special tools required. Simply place the grommet over the floor flange before setting the toilet in place. Make sure the flange and toilet base are clean and dry for the best seal. Standard hand tools are all you need to secure the toilet mounting bolts.
Why Choose Elkhart RV Parts?
We specialize in hard-to-find Dometic RV parts like this essential sealing grommet. Located in Elkhart, Indiana — the RV capital of the world — we understand the importance of having the right part when you need it. We stock genuine OEM Dometic parts and ship fast so you can get back on the road. Our team knows RV plumbing systems inside and out, and we're here to help you find exactly what you need with expert support every step of the way.
| Brand | Dometic |
|---|---|
| Product_type | Toilet Sealing Grommet |
| Part_number | 385311111 |
| Size | 1-1/2" |
| Compatible_series | 300310320 |
| Compatible_models | Dometic 300/310/320 Series Toilets |
| Function | Sealing grommet |
| Purpose | Watertight seal, leak prevention |
| Part_category | OEM Replacement Part |
| Installation_type | Replacement/Service Part |
| Key_features | Prevents leaksMaintains watertight sealRestores bowl alignmentEliminates water seepage |
| 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.