TOTO Aquia IV WASHLET+ S5 One-Piece Toilet

TOTO

SKU: MW6463446CEMFGN#01

$2,369.00

$1,659.00

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Integrated Bidet Seat: WASHLET S5

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TOTO Aquia IV WASHLET+ S5 — MW6463446CEMFGN#01

The TOTO Aquia IV WASHLET+ S5 One-piece Toilet pairs a completely skirted one-piece body and dual-flush DYNAMAX TORNADO FLUSH® with the WASHLET+ S5, which is the first tier in the range to bring a wireless remote.

The multifunction remote stores its own settings for up to four people, so a shared bathroom stops being a negotiation over water temperature and pressure, and nobody has to reset the seat after somebody else has used it.

Toilet Type: One-piece WASHLET+ toilet
Height: Universal Height
Bowl Shape: Elongated, completely skirted
Flush: DYNAMAX TORNADO FLUSH® — 1.28 / 0.9 GPF
Rough-In: 12" standard; optional 10" (TSU48.10) and 14" (TSU48.14)
Included WASHLET: WASHLET+ S5 (SW3446)
Controls: Multifunction remote, memory for up to 4 users
Auto Flush: Not included — TOTO lists no auto-flush kit for this combination

DYNAMAX TORNADO FLUSH® with Dual Flush

TOTO's DYNAMAX TORNADO FLUSH uses 360º cleaning power to reach every part of the bowl, and you pick 1.28 GPF for a full flush or 0.9 GPF for a reduced one.

CEFIONTECT® Ceramic Glaze

CEFIONTECT minimizes waste sticking to porous ceramic surfaces, which supports easier bowl cleaning between flushes.

Completely Skirted WASHLET+ Design

The skirted exterior gives you a flat surface to wipe rather than a contoured trapway, and the WASHLET+ connection conceals the seat's supply line.

Adjustable Warm-Water Cleansing

Front and rear washing uses aerated warm water with oscillating and pulsating modes, and spray position, temperature and pressure each adjust separately.

Heated Seat and Three-Setting Dryer

The seat is heated with its own temperature control, and the warm-air dryer offers three variable temperature settings.

Wireless Remote with Four-User Memory

The wireless remote stores personalized settings for up to four users, so each person gets their own temperature and pressure without resetting anything.

TOTO Aquia IV S5 MW6463446CEMFGN#01 Installation

TOTO Aquia IV WASHLET+ S5 One-Piece Toilet dimensions

TOTO Aquia IV WASHLET+ S5 One-Piece Toilet Compatibility

The TOTO Aquia IV WASHLET+ S5 is a one-piece smart toilet with an integrated S5 bidet seat. Confirm these four things before ordering:

Rough-in measurement: 12-inch standard. 10" and 14" supported with TSU01W adapter (sold separately).
Floor clearance: 21 inches in front of the bowl, 15 inches on each side.
Water supply: Standard ½-inch connection at the base of the toilet.
Electrical outlet: GFCI 120V required within 3 feet (powers integrated S5 bidet seat).

Installation steps

Prep. Shut off the water supply, flush to empty the tank, then disconnect the supply line.
Remove the old toilet. Unbolt from the floor and scrape the old wax ring from the flange.
Set the wax ring. Place a new wax ring on the flange, centered over the drain.
Seat the new toilet. Lower onto the flange, press down firmly, and hand-tighten the bolts evenly.
Connect and test. Reconnect the supply line, restore water, and plug into the GFCI outlet.

Need a Professional Installer near you?

If you need help finding a professional installer in your area, checkout Licensed TOTO Installers page to find one near you.

TOTO Aquia IV WASHLET+ S5 One-Piece Toilet Downloads

TOTO Aquia IV WASHLET+ S5 One-Piece Toilet Manual

TOTO Aquia IV WASHLET+ S5 One-Piece Toilet Spec Sheet

Frequently Asked Questions about TOTO Aquia IV S5 MW6463446CEMFGN#01

What is the benefit of a one-piece toilet?

A one-piece toilet has a smooth, seamless design that is easier to clean and looks more modern. It also has fewer gaps where dirt can build up.

Is it easy to use?

Yes, it comes with a remote control that makes it easy to adjust settings. It’s designed to be simple and user-friendly.

Does this toilet need electricity?

Yes, it requires a nearby power outlet to use features like the heated seat, warm water wash, dryer, and deodorizer.

Does the bidet have unlimited warm water?

Yes, the S5 provides continuous warm water, so it doesn’t run out during use. This makes it more comfortable, especially for longer use.

Can I adjust the bidet settings?

Yes, you can adjust the water temperature, pressure, and spray position. You can also save your preferred settings for easy use.

TOTO Aquia IV WASHLET+ S5 One-Piece Toilet

DYNAMAX TORNADO FLUSH® with 1.28 / 0.9 GPF Dual Flush

TOTO states that DYNAMAX TORNADO FLUSH utilizes 360º cleaning power to reach every part of the bowl.

You get two flush volumes: 1.28 GPF for a full flush and 0.9 GPF for the reduced flush, which TOTO classes as ultra high-efficiency.

The trap measures 2-1/4" across, and the bowl takes the standard 12-inch rough-in with 10-inch and 14-inch Unifit adapters available.

360º bowl-rinsing DYNAMAX TORNADO FLUSH
1.28 GPF full, 0.9 GPF reduced
2-1/4 inch trap diameter on the bowl

CEFIONTECT® with a Completely Skirted WASHLET+ Design

CEFIONTECT ceramic glaze minimizes waste from sticking to porous ceramic surfaces, supporting easier bowl cleaning between flushes.

TOTO describes the completely skirted design as a sleek and understated look that is easier to clean, with no contoured trapway to wipe around.

Because this is a one-piece toilet there is no seam between tank and bowl to wipe along.

CEFIONTECT glazed elongated bowl
Completely skirted one-piece exterior
Concealed WASHLET+ supply connection

Adjustable Warm-Water Cleansing with Heated Seat and Dryer

On this one-piece Aquia IV the S5 cleanses front and rear with gentle aerated warm water, with oscillating and pulsating features.

Spray position, water temperature and water pressure each adjust on their own, and the water range runs 95ºF–104ºF.

An instantaneous water heater supplies continuous warm water, the seat is heated across 82ºF–97ºF, and the warm air dryer offers three variable settings.

Front and rear aerated warm water
Oscillating and pulsating spray modes
Three-setting warm air dryer

EWATER+®, PREMIST® and a Wireless Remote with User Memory

EWATER+ auto-cleans the wand after every use, and PREMIST automatically mists the bowl before each one.

The wand also cleans itself inside and out before and after every use.

Controls are handled by a multifunction remote control with personalized memory settings for up to 4 users, and CLEAN RESIN keeps the wand and seat easier to maintain. Night light illuminates the inside of the bowl.

EWATER+ on the wand
PREMIST before every use
Memory settings for up to four users

What do you get with the Aquia IV WASHLET+ S5?

This is combination MW6463446CEMFGN#01: the Aquia IV one-piece toilet with the CST646CEMFGNAT40 elongated CEFIONTECT bowl, and the SW3446 WASHLET+ S5, in Cotton.

It is Universal Height, flushes at 1.28 / 0.9 GPF, and sets on a 12" rough-in, with 10" and 14" Unifit adapters available as TSU48.10 and TSU48.14.

TOTO lists no auto-flush kit for this combination, and the trap measures 2-1/4" across.

TOTO Aquia IV WASHLET+ S5 One-piece Toilet Features

Feature	Details
Aquia IV Toilet Features
DYNAMAX TORNADO FLUSH®	Utilizes 360º cleaning power to reach every part of the bowl.
Dual Flush	1.28 GPF full flush / 0.9 GPF reduced flush (4.8 LPF / 3.4 LPF).
CEFIONTECT®	Ceramic glaze minimizes waste from sticking to porous ceramic surfaces.
Completely Skirted Design	A sleek and understated look that's easier to clean.
WASHLET+ Concealed Connection	Concealed supply connection for seamless installation.
One-piece Construction	Elongated front bowl toilet and WASHLET+ S5 set.
Universal Height	Universal Height.
Auto Flush	Not included — TOTO lists no auto-flush kit for this combination.
WASHLET S5 Features
Front and Rear Cleansing	Gentle aerated, warm water, front and rear spray with oscillating and pulsating features.
Adjustable Cleansing	Adjustable spray position, water temperature, and water pressure.
Instantaneous Water Heating	Instantaneous water heater for continuous warm water and energy savings.
Warm Air Dryer	Three variable temperature settings, 95ºF–140ºF.
Heated Seat	Heated seat with temperature control, 82ºF–97ºF.
Automatic Deodorizer	Automatic air deodorizer.
EWATER+®	Auto-cleans the wand after every use.
PREMIST®	Automatically mists the bowl before each use.
Self-Cleaning Wand	Cleans itself inside and out before and after every use.
CLEAN RESIN®	Keeps wand and seat cleaner, more hygienic, and effortless to maintain.
Seamless Seat	Seamless seat design eliminates the gap where dirt collects.
Night Light	Illuminates the inside of the bowl.
Controls	Multifunction remote control with personalized memory settings for up to 4 users.
User Memory	Personalized memory settings for up to 4 users.
Auto Energy Saver	Adjusts the seat temperature when inactive.

TOTO Aquia IV WASHLET+ S5 One-piece Toilet Specifications

Specification	Details
Combination Model	MW6463446CEMFGN#01
Aquia Variant	Aquia IV
Toilet Construction	One-piece
Bowl Model	CST646CEMFGNAT40
Tank Model	N/A — one-piece toilet
WASHLET Model	SW3446 (WASHLET+ S5)
Bowl Shape	Elongated, completely skirted
Color	#01 Cotton
Height Classification	Universal Height
Seat Height	Not stated on this sheet
Rough-In	12"
Optional Rough-In	10" (TSU48.10) and 14" (TSU48.14)
Water Use	1.28 GPF / 0.9 GPF (4.8 LPF / 3.4 LPF)
Flush System	DYNAMAX TORNADO FLUSH®
Flush Control	Not stated on this sheet
Auto Flush	Not included — TOTO lists no auto-flush kit for this combination
Electrical	Not stated on this sheet
ADA Compliance	Not stated on this sheet
Warranty	One Year Limited Warranty (combination)