Toto Ultramax WASHLET+ Low Profile One-Piece Toilet - 1.28 GPF + S2

TOTO

SKU: MW6183346CEFG#01

$1,393.00

$1,350.00

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Integrated Bidet Seat: WASHLET S2

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TOTO Ultramax WASHLET+ S2 Low Profile

The TOTO Ultramax WASHLET+ S2 Low Profile is a Universal Height low-profile-tank one-piece that flushes once at 1.28 GPF on high-efficiency TORNADO FLUSH®, with the WASHLET+ S2 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.

Toilet Type: One-piece WASHLET+ toilet
Height: Universal Height — seat height 17-5/8" [447mm]
Bowl Shape: Elongated
Flush: High-efficiency TORNADO FLUSH® — single 1.28 GPF (4.8 LPF)
Rough-In: 12"
Included WASHLET: WASHLET+ S2 (SW3346)
Trap Diameter: 2"
Auto Flush: Not included — TOTO lists no auto-flush kit for this model

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

On the Ultramax sheets TOTO states that CEFIONTECT ceramic glaze prevents debris and mold from sticking to ceramic surfaces.

Decorative One-Piece Design

TOTO describes this as a decorative one-piece design with a low-profile tank, at Universal Height.

Adjustable Warm-Water Cleansing

The S2 cleanses front and rear with gentle aerated warm water, with oscillating and pulsating modes and independently adjustable 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 the seat does is reached from an arm panel beside you, so there is no remote to mount, misplace or fit batteries to.

TOTO UltraMax + S2 Installation

Toto Ultramax WASHLET+ Low Profile One-Piece Toilet - 1.28 GPF + S2 Compatibility

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

Rough-in measurement: 12-inch standard. 10-inch and 14-inch rough-ins are not available for this model.
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 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 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 Ultramax® WASHLET®+ Low Profile One-Piece Toilet - 1.28 GPF + S2 Downloads

Frequently Asked Questions about TOTO UltraMax + S2

Does the UltraMax WASHLET+ S2 require electricity?

Yes. A 120V GFCI-protected outlet is required to power the bidet seat's comfort and cleansing features.

What rough-in size does this toilet use?

The UltraMax WASHLET+ S2 is designed for a standard 12-inch rough-in installation.

Does the S2 include a heated seat?

Yes. The WASHLET S2 features a heated seat with adjustable temperature settings.

Does this model have warm water cleansing?

Yes. The S2 provides adjustable warm water front and rear cleansing functions.

Does the toilet include a dryer?

Yes. A built-in warm air dryer helps reduce the need for toilet paper.

High-efficiency TORNADO FLUSH® at 1.28 GPF

TOTO builds this Ultramax on its TORNADO FLUSH system, which the sheets describe 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" across, and the trap seal is 2-1/8".

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

CEFIONTECT® on a Decorative One-Piece Body

TOTO states on every Ultramax sheet that CEFIONTECT ceramic glaze prevents debris and mold from sticking to ceramic surfaces.

TOTO describes the body as a decorative one-piece design with a low-profile tank, and lists it at Universal Height.

Because it is one-piece there is no seam between tank and bowl to wipe along, and TOTO lists the whole unit as CST618CEFGAT40.

CEFIONTECT glazed elongated bowl
Decorative one-piece low-profile tank
Concealed WASHLET+ supply connection

Adjustable Warm-Water Cleansing with Heated Seat and Dryer

On this Low Profile Ultramax 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 TOTO Ultramax WASHLET+ S2 Low Profile?

This is combination MW6183346CEFG: the one-piece Ultramax Low Profile with the CST618CEFGAT40 elongated CEFIONTECT unit and the SW3346 WASHLET+ S2, in Cotton.

It is listed at Universal Height with a seat height of 17-5/8" [447mm], flushes once at 1.28 GPF (4.8 LPF), and sets on a 12" rough-in.

TOTO lists no auto-flush kit for any Ultramax Low Profile model, including the S7 and S7A, and states ADA compliance for the trip-lever installation only.

Ultramax Low Profile Features

Feature	Details
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 prevents debris and mold from sticking to ceramic surfaces.
Design	Decorative one-piece design with low-profile tank.
Height	Universal Height.
Trap Diameter	2".
Trap Seal	2-1/8".
Rough-In	12".
WASHLET+ Concealed Connection	Concealed supply connection for seamless installation.
One-Piece Construction	Elongated front bowl and WASHLET+ set.
Flush Control	Chrome plated trip lever.
Electrical	Gfci outlet 12" from the floor.
Auto Flush	Not included — TOTO lists no auto-flush kit for this model.

WASHLET S2 Features

Feature	Details
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.
Night Light	Illuminates the inside of the bowl.
Controls	Convenient arm control panel.
Auto Energy Saver	Adjusts the seat temperature when inactive.

TOTO Ultramax WASHLET+ S2 Low Profile One-Piece Toilet - 1.28 GPF Specifications

Specification	Details
Series	Ultramax Low Profile
Toilet Construction	One-Piece
One-Piece Unit Model	CST618CEFGAT40
Tank Model	N/A — one-piece toilet
Bowl Shape	Elongated
Color	#01 Cotton
Height Classification	Universal Height
Seat Height	17-5/8" [447mm]
Combination Model	MW6183346CEFG
WASHLET Model	SW3346 (WASHLET+ S2)
TOTO Spec Sheet	SS-02407
Rough-In	12"
Trap Diameter	2"
Trap Seal	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 model
Electrical	GFCI outlet 12" from the floor
ADA Compliance	ADA compliant (when installed with trip lever located on the approach side)
Warranty	One Year Limited Warranty (combination)