Description
Dometic 385345889 Floor Flange – 3" Male Pipe Thread (MPT) | Fits Traveler Series RV Toilets
Special Order Item – Estimated Lead Time: 1–3 Weeks
This is a special order item that is ordered directly from Dometic after your purchase. Please allow approximately 1–3 weeks for shipment. Special order items cannot be canceled or returned once the order has been placed with the manufacturer.
Product Description
The Dometic 385345889 Floor Flange is a genuine OEM replacement 3-inch Male Pipe Thread (MPT) floor flange designed for select Dometic Traveler Series RV toilets. It provides a secure mounting point while creating a dependable connection between your toilet and the RV's black holding tank.
Unlike the standard 3-inch spigot floor flange (385343765), this flange is designed specifically for RVs where the black holding tank has a 3-inch female threaded (FPT) opening. The flange threads directly into the tank fitting, providing a secure, leak-resistant installation without the need for a hub/socket connection.
Constructed from durable ABS plastic, the Dometic 385345889 is designed to withstand the demands of RV travel while providing years of reliable service.
Features & Benefits
- Genuine Dometic OEM replacement part
- Designed for 3" female threaded (FPT) black tank connections
- 3" Male Pipe Thread (MPT) connection
- Heavy-duty ABS plastic construction
- Creates a secure, leak-resistant toilet mounting surface
- Direct OEM replacement for the original factory flange
- Restores proper toilet stability and alignment
- Ideal for replacing damaged or worn threaded flanges
Compatible With
The Dometic 385345889 Floor Flange is compatible with the following Dometic Traveler Series RV toilets:
- Dometic 110
- Dometic 111
- Dometic 210
- Dometic 510+
- Dometic 510H
- Dometic 511+
- Dometic 910
- Dometic 911
- Dometic 2010
- Dometic 2011
Which Floor Flange Do I Need?
Choosing the correct floor flange depends on how your RV's black holding tank is constructed, not on the toilet model.
Use the Dometic 385345889 if:
✔ Your black holding tank has a 3-inch female threaded (FPT) opening.
The flange threads directly into the tank.
Use the Dometic 385343765 if:
✔ Your black holding tank has a 3-inch hub/socket opening.
The flange slides into (spigots into) the socket rather than threading into it.
Important: Although both flanges fit the same Traveler Series toilets, they are not interchangeable. Always verify your existing tank connection before ordering.
Common Reasons for Replacement
Replace your floor flange if you notice:
- Cracked or broken flange
- Damaged threads
- Loose or rocking toilet
- Water or waste leakage around the toilet base
- Toilet replacement or remodeling
- Worn mounting surface
Specifications
- Manufacturer: Dometic
- Part Number: 385345889
- Product Type: Floor Flange
- Connection Style: 3" Male Pipe Thread (MPT)
- Tank Connection: 3" Female Pipe Thread (FPT)
- Material: Heavy-duty ABS Plastic
- Color: Black
- Genuine OEM Dometic Replacement Part
Installation Overview
- Shut off the RV water supply.
- Remove the toilet.
- Remove the existing threaded floor flange.
- Verify your black tank has a 3-inch female threaded (FPT) opening.
- Thread the Dometic 385345889 into the tank connection.
- Install a new floor flange seal (recommended).
- Reinstall the toilet and tighten mounting hardware evenly.
Frequently Asked Questions
Will this fit my Dometic 510+ toilet?
Yes. The Dometic 385345889 is compatible with the Dometic 510+ Traveler Series toilet.
Does this fit the 110, 111, 210, 910, 911, 2010, and 2011 models?
Yes. This flange is compatible with all of those Traveler Series toilets.
What is the difference between this flange and Dometic 385343765?
The difference is the black tank connection—not the toilet.
- 385345889 threads into a 3-inch female threaded (FPT) tank opening.
- 385343765 installs into a 3-inch hub/socket tank opening.
Both support the same Traveler Series toilets but fit different plumbing configurations.
How do I know which flange I need?
Remove the toilet and inspect the tank opening:
- If you see internal threads, choose 385345889.
- If the opening is a smooth socket with no threads, choose 385343765.
Is this a genuine Dometic part?
Yes. The 385345889 is an authentic OEM Dometic replacement floor flange.
Why Buy from RVToiletParts.com?
At RVToiletParts.com, RV toilets are our specialty. We focus exclusively on RV toilets and replacement parts, helping customers identify the correct OEM components before they buy. If you're unsure which floor flange your RV requires, our knowledgeable team is happy to help.
