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How do I know if my bowl is Round or Elongated?

Older or basic toilets are round, the inside of the toilet bowl is usually about 11 inches around. More modern or deluxe toilets have an elongated bowl that is about 2 inches longer than it is. it’s a noticeable difference. If you’re still wondering, you can measure from the two mounting bolts at the seat hinge to the very front of the toilet bowl. That measurement will be about 16 1/2 inches if the bowl is round, and 18 1/2 inches if your bowl is elongated.

What are 1pc and 2 pc toilet and how are they different?

1pc toilet is sculpted into a seamless unit and has no crevices between the tank and bowl.

2pc toilet is one that has a separate tank and bowl which are bolted together upon installation.

Bio Bidet products are designed to fit almost all 1and 2pc toilets. However, there are some exceptions such as category ā€œCā€ below.

If you have a 1pc toilet with a deep French curve, please contact us with the make and model of your toilet for a compatibility check.


Bidet Template – print in 6 A4 papers to use it as a single page template

– Elongated Seat Template

– Round Seat Template

Toilet Brands – Most common in HomeDepot and Menards

Please contact us for any additional questions about toilet compatibility.

* = One Piece Toilet

Need help? 2 ways to get assistance.

Email: info@cleanbutt.com
Phone Number: 813-810-8119

American Standard

Good Models Antiquity, Astute Vormax, Boulevard*, Cadet1-4, Champion 4*, Clean, Colony, Edgemere, Mainstream, Portsmouth, Reliant, Repertoire, Retrospect, Saver, Studio Dual, Titan, Town Square*, Tropic, Yorkville
Bad Models Fairfield&, Tofino*


Good Models Belmont, Belmont HET*, Diplomat, Diplomat Compact, Stratus
Bad Models Canterbury

Gracier Bay

Good Models N2316, N2410EB/2410T , N2424EB/N2424T, N2428T/E, N2430
Bad Models N2420*


Good Models Adair*, Archer*, Bancroft, , Barrington, Cimarron, Devonshire, Highline, Kathryn*, Kelston, Memoirs*, Portrait*, Saile*, Tresham, Wellworth
Bad Models Gabrielle*, Persuade, Reve*, Rialto, San Raphael*, Santa Rosa*, San Souci*


Good Models Alto, Barrett, Brentwood, Cascade, Denali, Maverick, Mont Clair, Pro-Fit 1-4, Protector, Quantum, Summit, Waverly
Bad Models Aegean, Enso


Good Models Aimes*, Carolina*, Carlyle, Clayton, Dartmouth, Drake, Drake 2, Entrada, Guinevere*, Legato*, Lloyd, Nexus, Promenade, Rowan, Soiree*, Supreme*, Supreme II*, Ultramax*, Ultramax II*, Vespin II
Bad Models Aquia, Whitney


Good Models Brevard, Corrente, Foundations, Lilah, Prelude, Riosa, Turner
Bad Models Luxford

Models with a * next to their names are 1 piece toilets. 1 piece toilets should be viewed with extra scrutiny as the width of the unit where the tank connects to the bowl could be too wide for our non-electric bidets to fit since some of their components hang down to the left or right side of the toilet. These non-electric units are the BB-70, BB-270, Elite3, A3 and BB-i3000.

However, these 1 piece toilets should pose no issue with our electric units as they fully sit on top of the toilet rim. These electric units are the DBI, A7, Slim1, Slim2, USPA U, BB-600, BB-800, BB-1000, BB-1700, BB-2000, DiB, A8, USPA4800 and USPA6800.

A Happy Butt is a CleanButt