Can Dometic 310 Toilet Replace Thetford
Updated 02/19/2026 | Published 02/13/2026
Question:
Whats the measurement between the mounting holes. Im looking to replace a thetford toilet.?
asked by: Speed
Expert Reply:
Hey Speed, the mounting flange bolt hole dimensions between what you have now and the Dometic 310 part # DOM37FR are going to be the same but the important dimension you need to match is the rough in dimension which is the distance from the center of the mounting bolt holes to the wall behind the toilet. The Dometic requires at least 10 inches so check that to verify if this will work for you or not. Let me know if you have a smaller dimension down below.
(click to enlarge)
Jim C.
2/19/2026
Installation was easy, the only limitation was rotational positioning limited by original hold down bolt position but turned out to not be a problem, the new toilet will have the same orientation as the original. This was one of the best upgrades we’ve done to our trailer, feels almost like home now and has reduced the septic stink significantly. We spend 3-4 months a year in our TT and if we had known early on how much of a quality of life improvement this swap is, it would have been one of the first upgrades. Looking forward to summer number 3.
Jameson C.
2/19/2026
Product Page this Question was Asked From
Dometic 310 RV Toilet - Standard Height - Round Bowl - Slow Close Lid - Tan Ceramic
- RV Toilets
- Standard Height
- Round
- Slow Close Lid
- 10 Inch Rough-In
- Gravity Flush Toilet
- 360 Swirl - Better
- Ceramic and Plastic
- Tan
- Dometic
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Mike
2/19/2026
I replaced my original Thetford toilet with the Dometic 310 and the mounting holes matched with no issues. The dimension from the mounting bolts to the wall is 13" on my coach. This was an upgrade I should have done a long time ago. Good luck.