TOTO
TOTO Aquia IV One-Piece Dual Flush 1.28 and 0.9 GPF Universal Height Toilet S5 Bidet Seat MW6463446CEMFGN#01
TOTO Aquia IV One-Piece Dual Flush 1.28 and 0.9 GPF Universal Height Toilet S5 Bidet Seat MW6463446CEMFGN#01
Model: MW6463446CEMFGN#01
- Regular price
- Price: $1,659.00
- Regular price
- List Price: $2,370.00
- Sale price
- Price: $1,659.00
- Unit price
- / per
11 in stock
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PRODUCT DESCRIPTION
TOTO T40 WASHLET+ Aquia IV One-Piece Toilet with WASHLET S5 Bidet Seat
The TOTO T40 WASHLET+ Aquia IV combines a sleek, one-piece design with advanced bidet technology for a clean, modern, and comfortable bathroom experience. The WASHLET+ system conceals the power cord and water supply hose, creating a seamless, clutter-free look that complements any bathroom style.
Smart Comfort Meets Modern Design
Paired with the newly redesigned WASHLET S5 bidet seat, this model offers a luxurious upgrade to your daily routine. Enjoy adjustable front, rear, and soft rear washes with oscillating and pulsating spray modes—all controlled from a slim, wireless remote. Each function features five temperature and pressure levels for personalized comfort.
The S5’s heated SoftClose® seat keeps you warm year-round, while the built-in nightlight softly illuminates the bowl for easy use in low light. A warm air dryer and deodorizer complete the experience, reducing toilet paper use and maintaining freshness.
Advanced Hygiene with EWATER+® and PREMIST®
The PREMIST® function sprays the bowl before each use to help waste rinse away easily. After each wash, EWATER+® automatically cleans the wand inside and out—no chemicals required. This self-cleaning system keeps your toilet fresh, hygienic, and low-maintenance day after day.
Powerful and Efficient Flushing
The Aquia IV toilet features TOTO’s DYNAMAX TORNADO FLUSH®, delivering 360° cleaning power that reaches every part of the bowl. The CEFIONTECT glaze prevents waste from sticking, reducing the need for scrubbing and harsh cleaners. Choose between a 1.28 GPF full flush or a 0.9 GPF light flush using the chrome dual push button for efficient water conservation.
Designed for Every Home
Built at TOTO’s Universal Height for optimal comfort, the Aquia IV’s skirted one-piece design eliminates gaps between the tank and bowl—making cleaning simple and fast. It installs easily with a 12" rough-in and can be adapted for 10" or 14" rough-ins with optional parts (sold separately).
Key Toilet Features
- One-piece design with concealed WASHLET+ connections
- DYNAMAX TORNADO FLUSH® for powerful 360° cleaning
- Dual flush: 1.28 and 0.9 GPF options
- CEFIONTECT ceramic glaze prevents waste buildup
- Universal Height for comfortable seating
- Chrome top-mounted push button
- ADA, WaterSense®, CALGreen, and CEC compliant
- 12" rough-in (adapters available for 10" or 14")
Key WASHLET S5 Features
- Instant warm water with front, rear, and soft rear washes
- EWATER+® and PREMIST® for automated cleanliness
- Adjustable water pressure, temperature, and spray position
- Heated SoftClose® seat with five temperature levels
- Warm air dryer and automatic deodorizer
- Built-in nightlight for nighttime visibility
- Wireless remote with up to four personalized settings
- Seamless seat design for easier cleaning
- Auto energy saver mode for efficiency
- Docking station for quick installation and removal
Complete Comfort, Clean Design
The TOTO T40 WASHLET+ Aquia IV with S5 Bidet Seat delivers the perfect balance of technology, cleanliness, and style. From its hidden connections to its self-cleaning systems, this model redefines what a modern toilet can be—efficient, elegant, and exceptionally comfortable.
Warranty: Because we are a TOTO Authorized Dealer, you are entitled to their standard 1 Year Limited Warranty.
There are plenty of resources to help you pick the right bidet, install it and maintain it for years to come. Remember, you can always reach out to us with any questions.

I was amazed when Neil was SO incredibly helpful in purchasing the right model for our home. We made the purchase and in less than a week (we live in a very rural area) our toilet was here. I would recommend EverFlow to anyone!
Let customers speak for us
from 124 reviewsFrom beginning to end everything Everflow did was great. Excellent customer service, great advice, prompt follow up, and super fast delivery. 10/10.
Company make extra efforts to help me find a brand and model that fit my needs. Thank you!
Excellent service
I was amazed when Neil was SO incredibly helpful in purchasing the right model for our home. We made the purchase and in less than a week (we live in a very rural area) our toilet was here. I would recommend EverFlow to anyone!
The toilet/bidet is great. It does everything it's says it does and installation was fairly easy although I did watch a YouTube video by Toto to speed up the process. The real star of the show is the customer service. I spoke with the owner of the company personally and he was gracious enough to answer ever one of my questions. He was a pleasure to do business with and is definitely the person I will buy any additional toilets and/or bidets that I will need in the future. Product score A+... customer service score A++. I would highly recommend purchasing from this company.
The staff at EverFlow were incredibly helpful coordinating my order and helping with my questions. Cannot recommend them highly enough. Excellent communication, excellent products, and timely service.
Wonderful Toto Toilet! Wonderful Features! Very Happy with Purchase! THANK YOU!
Neal - the owner of Everflow Bidets is a throwback to the good old days of excellent customer service and trying to do right by your customers. I have had to make changes to my orders, and eventually had to return a couple of bidets because I changed my mind, and get a different model and size. Throughout the process, Neal was very patient, respectful, and tried to help me get the right products I need at a fair price. I love Toto products, and Neal and Everflow appear to have Japanese souls - rooted in respect and care for their customers. Strongly recommend them.
Very personal and professional customer service. Fast shipping
Working with Everclow was a breeze. The product arrived in perfect condition and spot on time. Product was exactly as described I would definitely order from Everflow again
“Excellent company with great customer service! Very polite, responsive, and professional. The whole process was smooth, and I’m very happy with their products. Highly recommend!”
The S5 is a great product that is very feature rich. It hits all the major features and functions for a bidet as well as including various extras such as the night light function. Overall, I would highly recommend the S5 to anyone looking for a bidet.
I was looking for a bidet seat for a round toilet. The owner of the company helped me find the perfect bidet seat and it was delivered just a few days later. The service was outstanding!
… this one’ll win your heart. I look forward to the pleasure of using it. Shoppers: dokeep in mind that you must install a GFI plug adjacent to this product unless one is already present
Arrived quickly, easy to install