Here is a comprehensive list of all the different matches. Find out all the information pertaining to whether or not your Toto washlet will go with your toilet. Toto Washlet compatible toilets

 TOTO Washlets are not universally compatible with all toilets. They are designed for specific TOTO toilet models that have the necessary features and connections. Prior to purchasing a TOTO Washlet, it is crucial to verify compatibility with your toilet to ensure proper installation. read more below

Which TOTO Toilets go with the S550e/S500e Washlet?

The ST550e/S500e Washlet ( IS compatible with the following one piece Elongated TOTO toilets)

1. AIMES® 

2. AQUIA IV 1G

3. AQUIA IV

4. CAROLINA® II

5. GUINEVERE®

6. LEGATO®

7. PROMENADE® II

8. 1G PROMENADE II

9. ECO SOIREE® SUPREME II

10. ECO ULTIMATE®

11. ULTRAMAX®

12. ULTRAMAX® II

13. 1G ULTRAMAX II 

The S550e/S500e Washlet (IS compatible with the following two piece elongated TOTO toilets)

1.AQUIA IV 1G

2.AQUIA IV

3. ECO CLAYTON®

4. CONNELLY®**

5. ECO DARTMOUTH®

6. DRAKE®

7. DRAKE II 1G

8. DRAKE II

9. ENTRADA

10. NEXUS® 1G

11. NEXUS

12. PROMENADE II 1G

13. PROMENADE II

14. VESPIN® II 1G

15. VESPIN® II

The S550e/S500e Washlet (IS NOT compatible with the following  TOTO toilets)

1. DRAKE II (two piece round)

2. DRAKE (two piece round)

3. DRAKE II 1G (two piece round)

4. PROMENADE (two piece round)

5.ULTIMATE (One Piece Round)

6. ULTRAMAX (One Piece Round)

Which TOTO Toilets go with S350e/S300e Washlet?

S350e/S300e is not compatible with the following one piece TOTO Toilets

1.AIMES® 

2.AQUIA IV 1G

3.AQUIA IV CAROLINA®

4.I CARLYLE® II

5.1G® CARLYLE II

6.GUINEVERE®

7.LEGATO®

8.PROMENADE® II

9.1G PROMENADE II

10.ECO SOIREE® SUPREME II

11.ECO ULTIMATE® ULTRAMAX®

12.ULTRAMAX® II
13. 1G ULTRAMAX II

S350e/S300e is compatible with the following one piece TOTO Toilets

1 .ULTIMATE (round)

2. ULTRAMAX (round)

Which TOTO Toilets go with the K300 Washlet?

The K300 Washlet Is not compatible with these toilets.

1. DRAKE II (round) two piece

2. DRAKE (round)two piece

3. DRAKE II 1G (round) two piece

4. PROMENADE (round) two piece

5. ULTIMATE (round)

6. ULTRAMAX (round)

Which TOTO Toilets go with the C2/C5 Washlet?

 The C2/C5 Washlet Is compatible with the following one piece elongated toilets

1.AIMES® 

2.AQUIA IV 1G

3.AQUIA IV

4.CAROLINA® II

5.CARLYLE® II 1G

6.® CARLYLE II 

7.GUINEVERE®

8.LEGATO®

9.PROMENADE® II

10.1G PROMENADE II

11.ECO SOIREE®

12.SUPREME II

13.ECO ULTIMATE®

14.ULTRAMAX®

15.ULTRAMAX® II

16.1G ULTRAMAX II

C2 Is not compatible with the following two piece elongated toilets

1. AQUIA IV** 1G

2. AQUIA IV

3. ECO CLAYTON®

4. CONNELLY®

5. ECO DARTMOUTH®

6. DRAKE®

7. DRAKE II 1G

8. DRAKE II

9. ENTRADA

10. NEXUS® 1G

11. NEXUS PROMENADE II 1G

12. PROMENADE II

13. VESPIN® II 1G

14. VESPIN® II

Is not compatible with the following Toilets

1. ULTIMATE Round One piece

2. ULTRAMAX Round One piece

3. DRAKE II Round two Piece

4. DRAKE Round two Piece

5. DRAKE II 1G Round two Piece

6. PROMENADE Round two Piece

WASHLET FIVE: C200/C100

Thw C200/C100 is not compatible with the following one piece elongated toilets

1.AIMES® 

2.AQUIA IV 1G

3.AQUIA IV CAROLINA®

4.I CARLYLE® II

5.1G® CARLYLE II

6.GUINEVERE®

7.LEGATO®

8.PROMENADE® II

9.1G PROMENADE II

10.ECO SOIREE® SUPREME II

11.ECO ULTIMATE® ULTRAMAX®

12.ULTRAMAX® II

13. 1G ULTRAMAX II

The C200/C100 Is compatible with the following one piece round toilets

1. ULTIMATE 

2. ULTRAMAX

The C200/C100 Is not compatible with the following Two piece elongated toilets

1.AQUIA IV 1G

2.AQUIA IV

3.ECO CLAYTON®

4.CONNELLY®**

5.ECO DARTMOUTH®

6.DRAKE®

7.DRAKE II 1G

8.DRAKE II

9.ENTRADA NEXUS®

10.1G NEXUS

11.PROMENADE II 1G

12.PROMENADE II

13.VESPIN® II 1G

14.VESPIN® II

Which TOTO Toilets go with the KC2 Washlet?

The Following toilets are compatible with the KC2 Washlet.

1. AIMES®

2. AQUIA IV 1G

3. AQUIA IV

4. CAROLINA® II

5. CARLYLE® II 1G®

6. CARLYLE II GUINEVERE®

7. LEGATO®

8. PROMENADE® II 1G

9. PROMENADE II

10. ECO SOIREE®

SUPREME II

ECO ULTIMATE®

ULTRAMAX®

ULTRAMAX® II

1G ULTRAMAX II

 What is the difference between a WASHLET and a bidet?

Toilets and bidets are distinct objects. They are often set up for a two-step bathroom procedure close to the toilet. A washlet is a toilet seat replacement that offers a variety of cleaning choices, such as wash, dry, positioning, pressure, heat, and more.

Do you need toilet paper with a TOTO washlet?

You don't need toilet paper with a toto washlet. The water temperature may be changed, and there are five spray modes on the remote-controlled wand, including oscillation, front cleansing, and rear cleansing. A warm-air drying cycle is also available, which virtually eliminates the need for toilet paper.

Do you need a TOTO toilet for the TOTO Washlet?

No you don't actually need a Toto Toilet to use a toto washlet. These washlet seat fit over many standard toilets. Determine whether your toilet has a round or elongated front first. The front of an elongated toilet's bowl measures 18.5 inches from the mounting holes, compared to 16.5 inches for a round front.
For an extended bowl, you require a round-fronted washlet, and for an oval bowl, you need an elongated type washlet. 

https://www.totousa.com/tips/will-a-washlet-fit-a-non-toto-toilet

How to Install a TOTO Washlet

1. Remove the old seat

2. Install the mounting bracket

3. Slide the TOTO Washlet on the bracket

4. Connect the Washlet Hose

5. Turn the Washlet on. 

Full guide: https://www.totousa.com/washlet/installation

How to select a TOTO Washlet

The price points and feature sets of the TOTO WASHLET series are extremely diverse. TOTO WASHLET chairs like the C100 and C200, which have a tank water heater, are available at the low end. Due to the tall back, these WASHLETS tend to be not as pleasant  than other models and have a limited supply of warm water. The water tank may be accommodated in the seat thanks to this design, but the client is pushed much farther forward than other options.

Which TOTO Washlet is the best?

Compared to other bidet seats, the Toto Washlet C5 offers more control over your preferences, such as a pulsating or oscillating stream, warm or cool water, and high or low pressure. Although the C5 has many features, it is still easy to use without all the bells and whistles. if you are new to bidets, you don't need to invest in a model like the Toto; simpler, less expensive cold-water models will also work just fine.