Replacing SeaLand 510 RV Toilet With Dometic 2 Bolt Flange Toilet Using 4 Bolt To 2 Bolt Adapter
Updated 08/15/2025 | Published 07/21/2025
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Question:
hello, I want to replace my SeaLand 510 toilet. is there an adapter from a 4 bolt for a 2 bolt base? I clicked on a link that said the Dometic 300 could replace it how ever the bolt pattern is 2 vs 4
asked by: Donna
Expert Reply:
Good eye Donna! Some people just install the 2 bolt Dometic 300 Weekender RV Toilet # DOM64FR onto a 4 bolt setup, but only secure it by the 2 bolts, which is not technically correct as this could cause issues and not fit correctly.
The correct way to do it is with the Dometic RV Toilet 4 Bolt Flange to 2 Bolt Toilet Adatper # DOM73FR. I've attached a photo of the instructions to help you out.
What happened to the old toilet? Just ready to be updated?
(click to enlarge)
Product Page this Question was Asked From
Dometic 300 RV Toilet - Standard Height - Round Bowl - White Polypropylene
- RV Toilets
- Standard Height
- Round
- 8-1/2 Inch Rough-In
- Gravity Flush Toilet
- Triple Jet - Good
- Plastic
- White
- Dometic
more information >
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Andrew N.
8/15/2025
Hey Donna, did the adapter work out for replacing your SeaLand 510 toilet with the Dometic 300? I'm curious because it might help others facing the same challenge!