TOTO Nexus WASHLET+ S2 One-Piece Toilet

TOTO

SKU: MW6423346CEFG#01

FREE Shipping + No Sales Tax

$2,343.00

$1,675.00

Integrated Bidet Seat: WASHLET S2

Quantity

Authorized TOTO National Dealer

Fast & Free Shipping On All Orders

Pay How You Want Credit Card, Shop Pay, PayPal, HSA/FSA with Truemed and more.

Dedicated Customer Support Hundreds of 5-Star Reviews

Questions? Talk to a Real Person.

(877) 420-3443 Message Us

Buying more than one? Get volume pricing for contractors, builders and bulk orders.

TOTO Nexus WASHLET+ S2 — MW6423346CEFG#01

The TOTO Nexus WASHLET+ S2 One-Piece Toilet is a completely skirted one-piece toilet flushing once at 1.28 GPF on TOTO's TORNADO FLUSH® system, with the WASHLET+ S2 and its arm control panel already fitted.

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: One-piece WASHLET+ toilet
Height: Universal Height
Bowl Shape: Elongated, completely skirted
Flush: High-efficiency TORNADO FLUSH® — single 1.28 GPF (4.8 LPF)
Rough-In: 12" standard; 14" option available
Included WASHLET: WASHLET+ S2 (SW3346)
Controls: Arm control panel
Auto Flush: Not included — TOTO lists no auto-flush kit for this combination

High-efficiency TORNADO FLUSH®

TOTO's TORNADO FLUSH rinses the bowl on a single 1.28 GPF flush, which TOTO classes as high-efficiency.

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.

Arm Control Panel

Everything the seat does is reached from an arm panel beside you, so there is no remote to mount, misplace or fit batteries to.

TOTO Nexus S2 MW6423346CEFG#01 Installation

TOTO Nexus WASHLET+ S2 One-Piece Toilet dimensions

TOTO Nexus WASHLET+ S2 One-Piece Toilet Compatibility

The TOTO Nexus WASHLET+ S2 is a one-piece smart toilet with integrated bidet. Confirm these four things before ordering:

Rough-in measurement: 12 inches standard (14-inch rough-in available; specify at checkout).
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 S2 WASHLET 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 the control panel 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 Nexus WASHLET+ S2 One-Piece Toilet Downloads

TOTO Nexus WASHLET+ S2 One-Piece Toilet Installation Manual

TOTO Nexus WASHLET+ S2 One-Piece Toilet Spare Parts Manual

TOTO Nexus WASHLET+ S2 One-Piece Toilet Spec Sheet

Frequently Asked Questions about TOTO Nexus S2 MW6423346CEFG#01

Is this toilet suitable for small bathrooms?

Yes, the one-piece design helps save space and gives a cleaner look. Its compact shape makes it a good option for most bathroom sizes.

Can I use this toilet during a power outage?

Yes, the toilet can still be flushed manually like a regular toilet. However, the bidet features will not work without electricity.

How do you use the bidet functions on this toilet?

You can control the bidet using the side panel attached to the seat. Simply select the wash function, then adjust the water temperature, pressure, and spray position to your comfort. After washing, you can use the dryer function if desired, making the whole process easy and convenient for daily use.

What kind of maintenance does this toilet require?

Regular cleaning is simple—just wipe down the surface and bowl like a standard toilet. The self-cleaning wand helps reduce buildup, but occasional cleaning of the wand and seat area is still recommended for best hygiene.

How does the water-saving flush system work?

The toilet uses a highly efficient flushing system that cleans the bowl using less water. Even with lower water usage, it still provides strong and reliable performance.

TORNADO FLUSH® at 1.28 GPF

TOTO builds this Nexus on its TORNADO FLUSH system, which the sheet describes as high-efficiency at 1.28 GPF.

This is a single-flush toilet: one volume, 1.28 GPF (4.8 LPF), with no reduced-flush setting to choose between.

The flush is operated by a chrome plated trip lever on the side of the tank, the trap measures 2-1/8" across, and the bowl sets on a standard 12" rough-in with a 14" option.

High-efficiency TORNADO FLUSH system
Single 1.28 GPF (4.8 LPF) flush
Chrome plated trip lever flush control

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, and TOTO lists the bowl as CST642CEFGAT40.

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 Nexus the S2 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.

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

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 Nexus WASHLET+ S2?

This is combination MW6423346CEFG#01: the Nexus one-piece toilet with the CST642CEFGAT40 elongated CEFIONTECT bowl, and the SW3346 WASHLET+ S2, in Cotton.

It is Universal Height, flushes once at 1.28 GPF (4.8 LPF), and sets on a 12" rough-in with a 14" option available.

TOTO lists no auto-flush kit for this combination, and the trap measures 2-1/8" across.

TOTO Nexus WASHLET+ S2 One-Piece Toilet Features

Feature	Details
Nexus Toilet Features
TORNADO FLUSH®	High-efficiency TORNADO FLUSH system - 1.28 GPF (4.8 LPF).
Water Use	Single flush, 1.28 GPF (4.8 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.
Trap Diameter	2-1/8".
WASHLET+ Concealed Connection	Concealed supply connection for seamless installation.
One-Piece Construction	Elongated front bowl and WASHLET+ S2 set.
Universal Height	Universal Height.
Flush Control	Chrome plated trip lever.
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 Nexus WASHLET+ S2 One-Piece Toilet Specifications

Specification	Details
Combination Model	MW6423346CEFG#01
Series	Nexus
Toilet Construction	One-Piece
Bowl Model	CST642CEFGAT40
Tank Model	N/A — one-piece toilet
WASHLET Model	SW3346 (WASHLET+ S2)
WASHLET Adaptor	N/A — one-piece toilet
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	14" option available
Trap Diameter	2-1/8"
Water Use	1.28 GPF (4.8 LPF)
Flush System	TORNADO FLUSH®
Flush Control	Chrome plated trip lever
Auto Flush	Not included — TOTO lists no auto-flush kit for this combination
Electrical	Not stated on this sheet
ADA Compliance	ADA compliant for residential use when installed with trip lever located on the approach side
Warranty	One Year Limited Warranty (combination)