List of Toilets Incompatible with (most) Bidet Seats

Most any toilet will work very nicely with bidet seats.  That being said, there are exceptions to the rule. Common things we see making a toilet incompatible with most if not all of bidet seats on the market are the spread of the bolt holes, the spacing in the back of the toilet near the holes that mount the seat, and/or tight french curves around the outside of the back of the toilet bowl. When it comes to spacing in the back, and french curve toilets, there are a few seats that will work, however, when it comes to extra wide spacing between the bolt holes where the seat connects, you'll be out of luck.  Below you'll find a table that lists known hard to fit toilets.


Examples of French Curve toilets

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Bidet Seats For Tight Fitting Toilets

Top Recommendation:

Cascade Bidet 3000


Others to consider:

Blooming Bidet R1063

Galaxy GB-5000 bidet seat



Totally Incompatible

Fitting Difficulty

Kohler Rialto (Model Number: K-3386) No, but not a perfect fit Cascade 3000, Blooming R1063 and Galaxy GB-5000 bidet seats will fit but they will hang over the front edge slightly
Kohler San Raphael (Model Number: K-3722) No Cascade 3000, Blooming R1063 and Galaxy GB-5000 seats will all work nicely
Kohler Rosario (Model Number: K-3434) No, but not a perfect fit Very tight fit.  Different years of this model vary slightly.  Some years will work with the Cascade, Blooming and Galaxy seats listed above, and other years won't work with either.  The only way to know for sure is to test it and return it if it doesn't fit
Kohler San Souci Model Number: K-4007) Yes This toilet is too tight in the back to work with any existing bidet seat currently on the market.  It's important to note that there are other model numbers for the Kohler San Souci that work just fine.  It's only the model number K-4007 that's a problem.
Kohler Trocadero (Model Number: K-3437) Yes This toilet has bolt holes spaced at 11 inches.  Currently there are no bidet seats that can be mounted with bolt holes this far apart.
Kohler San Martine (Model Number: K-3435) Yes The French curve on this toilet is too tight and narrow to allow any bidet seat currently on the market to fit it.
American Standard Savona (Model Number: 2097.012) Yes This toilet's tank has a bulge in it that gets in the way of any bidet seat you might want to install.  There are currently no seats on the market that will work on this toilet
American Standard Ellisse (Model Number: 2068.019) Yes The lack of space between the bolt holes and the tank on this toilet makes it impossible to install any bidet seat.
American Standard Hamilton (Model Number: 2092.017) Yes Like the Ellisse, the tank and bolt hole spacing makes bidet seat installation impossible.

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