What are the Differences Between TOTO WASHLET+ Systems? Our Complete, 3 Step Guide to Selecting the Perfect Unit

Click here for a PDF version of this article

If you’ve decided that you want to purchase a WASHLET+ System but are feeling overwhelmed by the plethora of options, you’re in the right place! This article is designed to serve as a step-by-step guide to choosing the perfect WASHLET+ System. Along the way, you’ll learn about the major differences between each one so you can feel confident that you’re making the ideal choice for your preferences and needs! (If you’re still figuring out what type of bidet will meet your needs best, we recommend starting with our soon-to-be-published article, Is a WASHLET+System Right for Me?)

What Comes with a TOTO WASHLET+ System?

When you buy a TOTO WASHLET+ system, you’re purchasing a top quality WASHLET (TOTO speak for “bidet seat”) along with a high-performing toilet that’s been specially designed to conceal the WASHLET’S cords and hoses. The result? A toilet and bidet with a silhouette that’s much sleeker than what you’d get by adding a bidet seat to your existing toilet.

STEP 1: Choosing a WASHLET

The first step in choosing a WASHLET+ system is deciding which bidet seat you want. The following bidet seats are included in TOTO’s WASHLET+ Systems:

If you’re already familiar with TOTO’s products you might notice that the model numbers for many of these WASHLET+ bidet seats are the same as the model numbers for TOTO’s regular WASHLET line (e.g. S550e, S500e, C2, C5). However, this does not mean that they’re the same.

A WASHLET+ and WASHLET with matching model number are the same in terms of features but not in how they’re configured. In other words, an S550e WASHLET+ seat has identical features to the S550e WASHLET seat, but the placement of the S550e WASHLET+’s cords and hoses only allows it to be installed on a compatible WASHLET+ toilet. In comparison, an S550e WASHLET can be installed on most toilets, including most WASHLET+ toilets, but its cords and hoses will always remain visible.

The tables below provide a side-by-side comparison of the different features on each WASHLET+ bidet seat. For a more detailed explanation of these features and what they do, check out our Glossary of Common Bidet Seat Terms.

TOTO WASHLET+ Bidet Seat Comparison Chart
For a larger version of this chart, click the PDF link below

Washlet+ with LED nightlight
Washlet+ with Ewater+
Washlet+ with Auto open Lid
Washlet+ with Instant Water Heater
Washlet+ with User Preset

STEP 2: Understanding Your WASHLET+ Toilet Options

Once you know which bidet seat is likely to meet your needs best, you can start narrowing down your toilet options. WASHLET+ toilets are divided into “families”, with names like “Aimes”, “Legato”, “Drake”, or “UltraMax II”. TOTO currently offers over seventeen different WASHLET+ toilet families.

Toilets within each family share the same silhouette, mounting style and flush mechanism but may feature varying flush volumes, rough-ins, seated heights, and ADA compliance ratings. Most notably, each toilet family is only compatible with select WASHLET+ bidet seats. For example, if you want an S550e bidet seat, you will be limited to the toilet families that are paired with the S550e. In general, each toilet family with be compatible with one of the following bidet seat groupings:

The one exception to this rule is the MH WASHLET+ wall hung toilet, which is only compatible with the C200 WASHLET+ bidet seat (now discontinued).

  • S550e & S500e
  • C2 & C5 (NEW!)
  • RX & RW
  • SX & SW
TOTO WASHLET+ Toilet and Bidet Seat Pairings
For a larger image, click on the PDF link below

Look & Feel

Below are snapshots of the WASHLET+ toilet families so you can start getting a feel for what each would look like in your bathroom.

Now that we’ve explained how TOTO groups bidet seats with toilet families, it’s time to move on to STEP 3 of this article, where we’ll help you select a specific toilet.

STEP 3: Choose a WASHLET+ Toilet

Once you know what bidet seat you want and which toilet families are paired with that seat, it’s time to decide on a specific toilet. To make this a bit easier, we’ve put together a comparison table that visually presents the differences between the toilets. If this chart seems intimidating, don’t worry! Scroll past the table for an in-depth explanation of every term!

For a larger version of this chart, click on the PDF link below

To view all Washlet+ bidets with 1.28 GPF, or 1.0 GPF.

Understanding WASHLET+ Toilet Terminology

Mounting Style & Rough-In

Most WASHLET+ toilets, are floor mounted, meaning that they connect to a flange in the bathroom floor just like a traditional toilet. “Rough-in” refers to the distance from the center of the floor flange to the back wall of the bathroom. While 12″ rough-ins are most common in the United States, some bathrooms have 10″ or 14″ rough-ins. All of TOTO’s floor-mounted WASHLET+ toilets are available with a 12″ rough-in, but some also come in 10″ and 14″ rough-ins to accommodate customers with unique bathroom configurations.

WASHLET+ with 14″ rough-in

WASHLET+ with 12″ rough-in

WASHLET+ with 10″ rough-in

A handful of WASHLET+ toilets are wall-mounted, which means that they are affixed to a heavy metal frame that is installed into the bathroom wall. There are two main benefits to this configuration: aesthetics and space saving. When it comes to style, wall hung toilets generally feature an ultra-modern silhouette and appear to float over the bathroom floor. Their flush mechanism and tank are concealed inside the wall which also means that they take up less space than a traditional toilet, making them ideal for bathrooms that are tight on space.

One-Piece vs. Two-Piece

A two-piece toilet’s bowl and tank come as separate pieces that fit together, whereas a one-piece toilet is constructed from a single, continuous piece of china. Because one-piece toilets don’t have a seam between the tank and bowl, they’re often easier to clean, sleeker looking, or even more compact than a two-piece toilet. On the other hand, one-piece toilets can be pricier, heavier, and harder to maneuver than their two-piece counterparts.

Some WASHLET+ models come in both one-piece and two-piece versions, while other models come only in one or the other. For example, Nexus WASHLET+ toilets (pictured below) are available in both one- and two-piece iterations, while Drake II toilets are two-piece only.

Washlet+ one-piece toilets

Washlet+ two-piece toilets

Nexus WASHLET+ One-Piece Toilet
Nexus WASHLET+ One-Piece Toilet
Nexus WASHLET+ Two-Piece Toilet
Nexus WASHLET+ Two-Piece Toilet

Skirted vs. Non-Skirted Silhouette

Skirted or non-skirted refers to whether the toilet’s trapway is visible or concealed. For readers who may be new to plumbing terms, the trapway is the portion of the toilet between the hole in the bottom of the bowl and the bathroom drainpipe. On a non-skirted toilet, the trapway’s raised silhouette is visible and the bowl’s contours are clearly defined. On a toilet with a semi-concealed trapway, the trapway’s outline is only partially defined and the contours of the toilet bowl remain distinct from the base. On a skirted toilet, the trapway is fully concealed and there is usually very little definition between the pedestal and the bowl, resulting in an ultra- smooth, streamlined silhouette.

Deciding between these options is mainly a matter of aesthetic preference, but do keep in mind that skirted toilets are easiest to keep clean thanks to their sleek lines and limited contours. In comparison, it takes a bit more time and effort to clean around the trapway on a non-skirted or semi-concealed toilet.

WASHLET+ Toilet Silhouettes - Skirts, Semi-Concealed, or Non-Skirted

Bowl Shape

The majority of WASHLET+ toilets feature an elongated bowl, which is oval in shape. A handful of models, all of which are wall mounted, feature a D-shaped bowl (round in front and flattened in the back) or a square bowl.

Carlyle II WASHLET+ C200 - Elongated Bowl Example
Elongated Bowl
TOTO RP WASHLET+ RW - D-Shaped Bowl Example
D-Shape Bowl
TOTO SP WASHLET+ SX - Square Bowl Example
Square Bowl
Elongated BowlD-Shape BowlSquare Bowl
AP (wall hung)
Carlyle II
Carolina II
Drake II
EP (wall hung)
Supreme II
Ultra Max
Ultra Max II
Vespin II
MH (wall hung)
RP (wall hung)

SX (wall hung)

Flush Mechanism: Trip Lever, Button or Push Plate

TOTO WASHLET+ Vespin II 1G S300e - Trip Lever Example
Trip Lever
TOTO WASHLET+ Vespin II 1G S300e

The vast majority of floor-mounted WASHLET+ toilets have a trip lever that’s similar to what you’d find on a traditional toilet. Pressing the lever lifts the flush valve inside the toilet, thus initiating the flushing process. All single flush toilets feature a trip lever mechanism, and some dual flush toilets come in this style too. Many (though not all) trip lever toilets are ADA compliant, meaning that they have a minimum seated height of 17″ and their trip lever can be installed on either the right or the left side of the toilet.

TOTO WASHLET+ Aquia IV S550e - Push Button Example
Push Button

A few floor-mounted WASHLET+ toilets feature a push button that’s located on the top of the tank, giving the toilet a modern look. Push buttons only come on dual-flush toilets, and the position of the button means that none are ADA compliant. Currently, only the Aquia toilet line features push buttons.

Wall-hung WASHLET+ toilets come with a push plate that’s installed into the bathroom wall. Users simply press the buttons on the push plate to initiate the flush. While all wall-hung WASHLET+ systems come with a matte silver pushplate with round buttons, additional styles are available.

WASHLET+ Matte Silver Round Button Push Plate
Matte Silver with Round Buttons (Default)
WASHLET+ Stainless Steel Round Push Plate
Stainless Steel Round (Upgrade)
WASHLET+ Stainless Steel Square Push Plate
Stainless Steel Square (Upgrade)
WASHLET+ White Round Push Plate
White Round (Upgrade)
WASHLET+ White Square Push Plate
White Square (Upgrade)

Auto-Flushing vs. Manual Flushing

All WASHLET+ toilets can be flushed manually, but those paired with certain bidet seat models offer an additional auto-flush option. Auto-flush equipped WASHLET+ systems use a sensor to detect when a person is standing up off the seat and automatically flush several seconds later. Having a hands-free flush option not only adds wow factor to your bathroom, it’s also a great option for customers with mobility limitations who may find it challenging to manually flush the toilet.

Bidet Seat ModelManual Flush Auto Flush Option
C2, C5YesNo
S550e & S500eYesYes
SX, SW, RX & RWNoYes

Manual Flush Selection
Auto Flush Selection

Flush Volume: Single vs. Dual

As the names indicate, single flush WASHLET+ toilets only offer one flush volume whereas dual flush WASHLET+ toilets offer two. Why might you want a dual flush toilet? Efficiency and conservation! Dual flush toilets offer a larger volume flush that’s designed for solid waste situations and a smaller volume flush for liquid waste. This setup saves water, making both your wallet and the planet a little bit happier.

Toilet Height: Standard or Universal

Standard or “regular” height toilets generally measure about 15″ from the floor to the top of the seat. In comparison, universal height toilets (sometimes referred to as “comfort height”) generally measure 17-19″ to the top of the seat. However some companies, including TOTO, define “universal height” as a seated height of 16.5″ or taller.

The main benefit of a universal height toilet is that the higher seat reduces the amount of coordination and effort needed to sit down and stand back up. For this reason, universal height toilets are the ideal choice for anyone with knee difficulties or mobility challenges.

ADA Compliant vs. Non-ADA Compliant

View our selection of ADA Compliant products

In order for a toilet to be ADA compliant, its design and installation must conform to the guidelines set forth in the Americans with Disabilities Act. In terms of design, ADA compliant toilets must have a minimum seated height of 17″, and they must come with a trip lever that can be installed on either the left or right side of the toilet.

A question we hear often is, “are universal height toilets also ADA compliant?” The short answer: sometimes! You may recall that TOTO’s definition for universal height is a seated height of 16.5″ or taller. This means that some of their universal height toilets are too short to meet ADA compliance criteria for seated height. Additionally, some TOTO universal height toilets have a push button, which is located on the top of the tank, or a trip lever that can only be installed on one side of the toilet, and neither of these setups meet the requirements for ADA compliance.

Additional information on ADA standards for accessibility can be found on the Americans with Disabilities Act website.

Final Thoughts

We know that selecting a WASHLET+ system can feel daunting! If you find yourself feeling a bit overwhelmed by all the information in this article, we encourage you to reach out to us directly. We would love to work alongside you to find a WASHLET+ system that’s perfect for your needs, and we’re always happy to answer any questions you might have. You can connect with us a number of ways: