TOTO Ultramax WASHLET+ One-Piece Toilet - 1.6 GPF

TOTO

SKU: MW6083346CSFG#01

$1,393.00

$1,199.00

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Integrated Bidet Seat

WASHLET S2

WASHLET S5

WASHLET S7

WASHLET S7A

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TOTO Ultramax WASHLET+

The TOTO Ultramax WASHLET+ is a Universal Height high-profile-tank one-piece that flushes once at 1.6 GPF on TORNADO FLUSH®, sold with your choice of four WASHLET+ bidet seats.

The toilet underneath is the same whichever you choose — same one-piece body, same flush. What changes is the seat: how far EWATER+ reaches, what the controls look like, and whether the lid opens on its own.

Toilet Type: One-piece WASHLET+ toilet
Height: Universal Height — seat height differs by WASHLET tier; see the comparison table
Bowl Shape: Elongated
Flush: TORNADO FLUSH® — single 1.6 GPF (6.0 LPF)
Rough-In: 12"
WASHLET Options: WASHLET+ S2, S5, S7 or S7A — selected as a variant on this listing
Trap Diameter: 2"
Auto Flush: A choice on the S7 and S7A — Auto Flush or No Auto Flush, selected on this listing. The auto-flush model adds TOTO's THU857 Auto Flush Kit. The S2 and S5 sheets list no auto-flush kit at all

Single-Flush TORNADO FLUSH®

TOTO's TORNADO FLUSH rinses the bowl on a single flush of 1.6 GPF (6.0 LPF), the volume TOTO rates this model at.

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 high-profile tank, at Universal Height.

Four WASHLET+ Tiers on One Toilet

S2, S5, S7 and S7A all fit this same Ultramax body, so the decision is about the seat you want rather than which toilet to buy.

Warm-Water Cleansing on Every Tier

All four seats cleanse front and rear with gentle aerated warm water, with oscillating and pulsating modes and adjustable position, temperature and pressure.

Heated Seat and Warm-Air Dryer on Every Tier

Every tier has a heated seat with its own temperature control and a warm-air dryer; the S7 and S7A step up from three dryer settings to five.

TOTO UltraMax MW6083346CSFG Installation

TOTO Ultramax WASHLET+ One-Piece Toilet - 1.6 GPF dimensions

TOTO Ultramax WASHLET+ One-Piece Toilet - 1.6 GPF Compatibility

The TOTO Ultramax WASHLET+ is a one-piece smart 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 system).

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+ Downloads

TOTO Ultramax WASHLET+ Installation Manual

TOTO Ultramax WASHLET+ S5 Spec Sheet

TOTO Ultramax WASHLET+ S2 Spec Sheet

TOTO Ultramax WASHLET+ S7 Spec Sheet

TOTO Ultramax WASHLET+ S7A Spec Sheet

Frequently Asked Questions about TOTO UltraMax MW6083346CSFG

Is TOTO Ultramax a good toilet?

Yes, the TOTO Ultramax is a highly regarded toilet known for its exceptional reliability and durable one-piece construction. Homeowners and professionals trust it because its large trapway and strong flush engine work together effectively to prevent clogs and ensure a dependable everyday bathroom routine.

What is the difference between TOTO Ultramax and Ultramax II?

The main difference is their flushing volume and tank styling, as the original Ultramax features a classic high-profile tank that utilizes a robust 1.6 GPF water volume for maximum rinsing power. In contrast, the Ultramax II is designed primarily for high-efficiency water conservation, utilizing a lower 1.28 GPF flow rate alongside a slightly modified silhouette.

What is the meaning of Ultramax?

In TOTO's lineup, the name Ultramax represents a combination of maximum flushing performance, robust clearing power, and heavy-duty durability. It signifies a product line engineered to handle high-volume daily use effortlessly while giving homeowners total peace of mind against clogs.

What are the benefits of Ultramax?

The Ultramax provides excellent benefits, including a leak-resistant one-piece body that eliminates the traditional tank-to-bowl gasket and a powerful dual-nozzle TORNADO FLUSH® system. Additionally, its smooth CEFIONTECT® ceramic glaze keeps waste from sticking to simplify cleaning, while the integrated WASHLET+ channels hide all bidet cords and hoses completely out of sight.

What is Ultramax good for?

The TOTO Ultramax is ideal for busy family bathrooms and high-traffic households that require a strong, clog-resistant flush paired with traditional styling. It is especially good for homeowners who want to upgrade to a premium water-wash system while keeping a classic, high-profile tank appearance and a robust 1.6 GPF water volume.

TOTO Ultramax WASHLET+ One-Piece Toilet - 1.6 GPF

TORNADO FLUSH® at 1.6 GPF

TOTO builds this Ultramax on its TORNADO FLUSH system and rates it on the sheets at 1.6 GPF (6.0 LPF).

This is a single-flush toilet: one volume, 1.6 GPF (6.0 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".

TORNADO FLUSH system at 1.6 GPF
Single 1.6 GPF (6.0 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 high-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 CST608CSFGAT40.

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

Choosing Your WASHLET: S2, S5, S7 or S7A

The S2 is controlled from an arm panel beside the seat; the S5, S7 and S7A each come with a remote that stores settings for up to four people.

EWATER+ is the real step between the tiers: the S2 and S5 auto-clean the wand, while the S7 and S7A clean the wand and the bowl.

The S7A is the only tier with a touchless auto open/close lid, and the S7 and S7A each let you choose Auto Flush or No Auto Flush at the same time.

S2 — arm control panel
S5 — remote with four-user memory
S7 and S7A — EWATER+ on wand and bowl

EWATER+®, PREMIST® and Self-Cleaning on Every Tier

PREMIST automatically mists the bowl before each use, and the wand cleans itself inside and out before and after every use.

CLEAN RESIN keeps the wand and seat cleaner, more hygienic and effortless to maintain, on all four tiers.

Every tier has a night light; on the S7 and S7A TOTO states that it illuminates the side and the inside of the bowl.

PREMIST before every use
Self-cleaning wand, inside and out
CLEAN RESIN wand and seat finish

What do you get with the TOTO Ultramax WASHLET+?

Every variant on this listing is the same one-piece Ultramax: the CST608CSFGAT40 elongated CEFIONTECT unit, in Cotton, plus the WASHLET+ seat you select.

It is listed at Universal Height, flushes once at 1.6 GPF (6.0 LPF), and sets on a 12" rough-in.

Seat height is the one toilet measurement that changes with the seat you pick: TOTO lists the S2 and S5 at 17-5/8" [447mm] and the S7 and S7A at 17-1/4" [437mm].

On the S7 and S7A you also choose Auto Flush or No Auto Flush. The auto-flush model carries TOTO's THU857 Auto Flush Kit and an “A” on the end of its model number; the S2 and S5 sheets list no auto-flush kit at all.

Ultramax Features

Feature	Details
TORNADO FLUSH®	TORNADO FLUSH system - 1.6 GPF (6.0 LPF).
Water Use	Single flush, 1.6 GPF (6.0 LPF).
CEFIONTECT®	Ceramic glaze prevents debris and mold from sticking to ceramic surfaces.
Design	Decorative one-piece design with high-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	A choice on the S7 and S7A — Auto Flush or No Auto Flush, selected on this listing. The auto-flush model adds TOTO's THU857 Auto Flush Kit. The S2 and S5 sheets list no auto-flush kit at all.

WASHLET Comparison

	WASHLET+ S2	WASHLET+ S5	WASHLET+ S7	WASHLET+ S7A
Combination model	MW6083346CSFG	MW6083446CSFG	MW6084726CSFG / MW6084726CSFGA with auto flush	MW6084736CSFG / MW6084736CSFGA with auto flush
Spec sheet	SS-02414	SS-02413	SS-02412	SS-02411
WASHLET part	SW3346	SW3446	SW4726AT40	SW4736AT40
Controls	Convenient arm control panel	Multifunction remote control	Multifunction pearl white remote control	Multifunction pearl white remote control
User memory	—	Up to 4 users	Up to 4 users	Up to 4 users
EWATER+®	Wand	Wand	Wand and bowl	Wand and bowl
Warm-air dryer	Three settings	Three settings	Five settings	Five settings
Spray water range	95ºF–104ºF	95ºF–104ºF	86ºF–104ºF	86ºF–104ºF
Seat height	17-5/8" [447mm]	17-5/8" [447mm]	17-1/4" [437mm]	17-1/4" [437mm]
Night light	Illuminates the inside of the bowl	Illuminates the inside of the bowl	Illuminates the side and the inside of the bowl	Illuminates the side and the inside of the bowl
Auto open/close lid	—	—	—	Touchless
Auto flush	No kit listed	No kit listed	Your choice — THU857 kit	Your choice — THU857 kit
ADA, as TOTO states it	ADA compliant (when installed with trip lever located on the approach side)	ADA compliant (when installed with trip lever located on the approach side)	ADA compliant for residential use with auto flush feature model, or with trip lever located on the approach side	ADA compliant for residential use with auto flush feature model, or with trip lever located on the approach side

TOTO Ultramax WASHLET+ One-Piece Toilet - 1.6 GPF Specifications

Specification	Details
Series	Ultramax
Toilet Construction	One-Piece
One-Piece Unit Model	CST608CSFGAT40
Tank Model	N/A — one-piece toilet
Bowl Shape	Elongated
Color	#01 Cotton
Height Classification	Universal Height
Seat Height	Differs by WASHLET tier — see the comparison table
Rough-In	12"
Trap Diameter	2"
Trap Seal	2-1/8"
Water Use	1.6 GPF (6.0 LPF)
Flush System	TORNADO FLUSH®
Flush Control	Chrome plated trip lever
Auto Flush	A choice on the S7 and S7A — Auto Flush or No Auto Flush, selected on this listing. The auto-flush model adds TOTO's THU857 Auto Flush Kit. The S2 and S5 sheets list no auto-flush kit at all
Electrical	GFCI outlet 12" from the floor
Warranty	One Year Limited Warranty (combination)