Toilet size and shape.


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

1pc toilet is a 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 "C" below,

If you have a 1pc toilet with a deep French curve, please contac t 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

1 of 6 | 2 of 6 | 3 of 6 | 4 of 6 | 5 of 6 | 6 of 6

- Round Seat Template

1 of 6 | 2 of 6 | 3 of 6 | 4 of 6 | 5 of 6 | 6 of 6

Toilet Brands - Most common in HomeDepot and Menards

Please contact us for any additional questions about toilet compatibility.
* = One Piece Toilet


American Standard

Good Models Astute Vormax, Boulevard*, Cadet 1-4, Champion 4*, Colony, Reliant, Studio Dual, Titan, Town Square*, Tropick, Yorkville
Bad Models Fairfield&, Tofino*



Good Models Diplomat, Belmont, Belmont HET*,Diplomat, Diplomat CompactStratus
Bad Models Canterbury


Gracier Bay

Good Models N2316, N2428T/E, N2410EB/2410T
Bad Models N2420 1*



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



Good Models Alto, Brentwood, Enso, Pro-Fit 1-4, Quantum, Summit, Waverly
Bad Models Aegean



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

  Aquia, Whitney



Good Models

Brevard, Corrente, Lilah, Prelude, Riosa, Turner