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TOTO Aquia IV WASHLET+ S2 Two-Piece Toilet - White toilet with seat on a white background

TOTO Aquia IV WASHLET+ S2 Two-Piece Toilet

TOTO
SKU: MW4463346CEMGN#01
$1,739.00
$1,241.00

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Integrated Bidet Seat: WASHLET S2
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TOTO Aquia IV WASHLET+ S2 — MW4463346CEMGN#01

The TOTO Aquia IV WASHLET+ S2 Two-piece Toilet is a two-piece, completely skirted toilet running dual-flush DYNAMAX TORNADO FLUSH®, with TOTO's WASHLET+ S2 already fitted and its supply line hidden.

Controls sit on an arm panel beside the seat rather than on a remote, which keeps the installation simple and leaves nothing to misplace, mount or fit batteries to. Everything the seat does is reached from where you are sitting.

  • Toilet Type: Two-piece WASHLET+ toilet
  • Height: TOTO does not state a height class
  • 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+ S2 (SW3346)
  • Controls: Arm control panel
  • 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

The S2 washes front and rear with aerated warm water, with oscillating and pulsating modes and adjustable spray position, temperature and pressure.

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.

Arm Control Panel

Everything on the S2 is driven from a convenient arm control panel, so there is no remote to mount, pair or replace batteries in.

TOTO Aquia IV S2 MW4463346CEMGN#01 Installation

TOTO Aquia IV WASHLET+ S2 Two-Piece Toilet dimensions

TOTO Aquia IV WASHLET+ S2 Two-Piece Toilet Compatibility

The TOTO Aquia IV WASHLET+ S2 is a two-piece elongated toilet with an integrated smart bidet seat. Confirm these four things before ordering:

  • Rough-in measurement: 12 inches 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 within 3 feet (powers integrated bidet seat).

Installation steps

  1. Prep. Shut off the water supply, flush to empty the tank, then disconnect the supply line.
  2. Remove the old toilet. Unbolt from the floor and scrape the old wax ring from the flange.
  3. Set the bowl. Place a new wax ring on the flange, lower the bowl onto it, and hand-tighten the bolts evenly.
  4. Attach the tank. Bolt the tank to the bowl using the rubber gasket and bolts provided.
  5. Connect and test. Reconnect the supply line, restore water, and plug the seat 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+ S2 Two-Piece Toilet Downloads

TOTO Aquia IV WASHLET+ S2 Installation & Owner's Manual

TOTO Aquia IV WASHLET+ S2 Spec Sheet

Frequently Asked Questions about TOTO Aquia IV S2 MW4463346CEMGN#01

Is the TOTO Aquia IV a good toilet?

Yes, the TOTO Aquia IV is a good toilet because it flushes well, saves water, and has built-in bidet features that keep it clean and comfortable.

What's the difference between TOTO WASHLET and washlet+?

The difference is that Washlet+ comes already matched to a specific toilet for a seamless, tidy look. A regular WASHLET can fit many toilets, but cords and hoses may show.

What are the TOTO Aquia IV features?

The TOTO Aquia IV features a powerful tornado flush, dual flush options, self-cleaning wand (EWATER+), PREMIST spray, quiet flush, skirted design, and a soft-close seat.

What is the TOTO Aquia IV made of?

The TOTO Aquia IV is made of ceramic with a smooth CEFIONTECT glaze that keeps the bowl clean and prevents waste from sticking.

Which is better, 1.28 GPF or 1.6 GPF?

1.28 GPF is better for saving water while still giving a strong flush. 1.6 GPF uses more water but feels a bit stronger. Most people choose 1.28 GPF to save water.

TOTO Aquia IV WASHLET+ S2 Two-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 flush is operated by a chrome push-button, and the trap measures 2-1/4" across.

  • 360º bowl-rinsing DYNAMAX TORNADO FLUSH
  • 1.28 GPF full, 0.9 GPF reduced
  • Chrome push-button flush control
TOTO Aquia IV WASHLET+ S2 Two-Piece Toilet

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.

This is a two-piece toilet, so the tank and bowl are separate components: the CT446CEGNT40 bowl and the ST446EMNA tank.

  • CEFIONTECT glazed elongated bowl
  • Completely skirted two-piece exterior
  • Concealed WASHLET+ supply connection
TOTO Aquia IV WASHLET+ S2 Two-Piece Toilet

Adjustable Warm-Water Cleansing with Heated Seat and Dryer

The S2 fitted to this Aquia IV cleanses front and rear using gentle aerated warm water, with both oscillating and pulsating features.

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

TOTO does not state the heating type for this seat, so this page claims none, 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
TOTO Aquia IV WASHLET+ S2 Two-Piece Toilet

EWATER+®, PREMIST® and Convenient Arm Controls

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

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

Controls are handled by a convenient arm control panel, 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
  • Convenient arm control panel

What do you get with the Aquia IV WASHLET+ S2?

This is combination MW4463346CEMGN#01: the Aquia IV two-piece toilet with the CT446CEGNT40 elongated CEFIONTECT bowl, the ST446EMNA tank, and the SW3346 WASHLET+ S2, in Cotton.

It 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's sheet for this model states no height classification.

TOTO lists no auto-flush kit for this combination, and the trap measures 2-1/4" across. The 9AU321-A WASHLET adaptor is part of the set.


TOTO Aquia IV WASHLET+ S2 Two-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.
Two-piece Construction Elongated front bowl and WASHLET+ S2 and tank set.
Flush Control Chrome push-button.
Auto Flush Not included — TOTO lists no auto-flush kit for this combination.
WASHLET S2 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.
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 Convenient arm control panel.
Auto Energy Saver Adjusts the seat temperature when inactive.


TOTO Aquia IV WASHLET+ S2 Two-piece Toilet Specifications

Specification Details
Combination Model MW4463346CEMGN#01
Aquia Variant Aquia IV
Toilet Construction Two-piece
Bowl Model CT446CEGNT40
Tank Model ST446EMNA
WASHLET Model SW3346 (WASHLET+ S2)
Bowl Shape Elongated, completely skirted
Color #01 Cotton
Height Classification TOTO does not state a height class
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 Chrome push-button
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)

TOTO Aquia IV S2 MW4463346CEMGN#01 Reviews