511+ Traveler Parts
OEM Replacement Parts for the Dometic/Sealand 511+ Traveler Toilet
If your Dometic/Sealand 511+ Traveler toilet isn't holding water in the bowl, leaking at the base, or the water valve isn't shutting off cleanly, you're in the right place.
This page covers OEM replacement parts for the 511+ Traveler, a pedal-operated gravity flush toilet used in boats and RVs. Environmental Marine is a Dometic Master Sanitation Distributor, so you’ll find genuine parts in stock and priced right.
Not sure if the 511+ is your model? Use our RV Gravity Toilet finder.
Common Issues and the Parts That Fix Them
The 511+ Traveler is a reliable toilet, but a handful of parts wear out with regular use.
Bowl won't hold water: Start with the bowl seals. The 511+ uses a 2-part bowl seal without drain holes. If water drains from the bowl when the toilet is idle, that's almost always the culprit.
Water keeps running or won't shut off: That's typically the water valve. The replacement valve features a brass stem, which is more durable than the older plastic version.
Odor or leaking at the floor: Check the floor flange seal and mounting hardware. The 511+ uses a 3" floor flange, and Environmental Marine carries spigot, socket, and MPT configurations.
Seat or lid damage: Replacement seats and lids are available in the 500+ series, including slow-close wood options in white and bone.
Frequently Asked Questions
Are these genuine Dometic/Sealand parts?
Yes. Environmental Marine is a Dometic Master Sanitation Distributor. All parts are OEM.
How do I know which floor flange I need?
It depends on your existing plumbing connection. Spigot flanges fit inside 3" PVC socket fittings (the spigot is the same outside diameter as pipe); socket flanges accept 3" PVC pipe inside; and 3” MPT (Male Pipe Thread) flanges are male pipe thread to thread into a fitting or tank top with 3” Female Pipe Thread. If you're not sure, give us a call before ordering.
What if I’m not sure which part I need?
Call us at 1-800-522-2656, Monday through Friday, 8:00 AM to 4:30 PM. We're happy to help you identify the right part before you order. Or contact us online.
Are there other Traveler toilet models with available parts?
Yes. If the 511+ isn't your model, you can browse all Gravity Traveler Toilet Parts or visit Dometic/Sealand to find your system.
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