What is a TOTO Washlet + Combo?


When looking for a new toilet that is compatible with a TOTO Washlet, there is no better choice than a TOTO Washlet + combo. This system pairs a Washlet+ seat with a TOTO T40 style toilet and blends them seamlessly to give you the full luxury bidet experience, but at a much more affordable price than the fully integrated TOTO Neorests.

Apart from a beautiful aesthetic, choosing a TOTO Washlet + combo allows you to bypass any worry of fitment issues. It easily and neatly conceals the electrical cord and water supply hose for a sleek, modern look. Consider the TOTO Washlet + system as a bridge between adding a bidet seat to a regular toilet and a fully integrated bidet toilet.

Let’s take a deeper look at what composes a TOTO Washlet + combo and how it can be the right choice for your bathroom.

T40 Toilet

The TOTO Washlet + system comes with what is known as a T40 style toilet. This specific type of TOTO toilet is designed to be paired with TOTO Washlet + bidet seats. 

A T40 toilet will have a large hole in the back of the toilet bowl, near the toilet seat mounting area. This hole allows you to pass a Washlet+ seat’s water supply hose and electrical cord through the trapway to the back of the toilet. This allows you to achieve a sleek, modern look for your toilet bidet setup; absent of any protruding supply hoses and cords.

Two Different Versions of the TOTO Washlet

The “+” in Washlet + differentiates it from the regular TOTO Washlet models. Both have the same features and functions but with one crucial difference; Washlet + versions are made specifically for, and are only compatible with, TOTO T40 toilets. 

What is the difference? 

TOTO Washlet + versions differ from regular Washlets in that they have their electrical cord and water supply located at the bottom of the bidet seat. This allows for the cord and supply hose to be routed through the trapway hole on TOTO T40 toilets to achieve a more aesthetically pleasing look, similar to fully integrated bidet toilets. 


You will find that choosing a Washlet + combo has some great advantages. For one, you will be getting a similar look to many higher priced integrated toilets, such as the TOTO Neorest, but at a much lower price. 

Cleaning the bidet and toilet will also be easier as you will not have to worry about any protruding hoses or electrical cords. You also have the option of installing an auto flush kit to your Washlet + combo. The auto flush kit will allow you to control your toilet’s flush via the Washlet remote control.

It is important to note that not all TOTO Washlet + combos are auto flush capable. Please read over the product description to check if the model you are looking at is compatible with the auto flush kit. 


Although opting for a Washlet + combo can be a great option, it is important to know of a minor disadvantage; once installed, it can be a little difficult to remove. This is due to the unique design of the water supply hose and electrical hose being routed through the concealed trapway of the T40 toilet.  As a result, once your toilet is installed, it can be difficult to access the bidet seat’s water connection behind the toilet.