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The TOTO T40 WASHLET+ Supreme II One-Piece Elongated 1.28 GPF Toilet and WASHLET C2 Bidet Seat is designed to conceal the WASHLET power cord and water supply hose for a seamless installation. Part of the newly redesigned C Series, the WASHLET C2 features a soft rear spray, rear cleanse, and front cleanse with the option of an oscillating stream. The temperature and pressure of the water are adjustable with three temperature settings and five pressure settings. The controls are located on a convenient arm control panel. PREMIST wets the surface of the toilet bowl, aiding in the removal of waste and resulting in a better clean. The C2 model utilizes TOTO's EWATER+ system when the wand self-cleans. EWATER+ transforms the water into a safe and powerful compound, creating peace of mind by cleaning the inside and outside of the wand before and after every use. The WASHLET features a heated SoftClose seat with three temperature settings. The Supreme II toilet features TOTO's TORNADO FLUSH, a hole-free rim design with dual-nozzles that creates a centrifugal washing action that assists in rinsing the bowl more efficiently. This version of the TOTO Supreme II includes CEFIONTECT, a layer of ceramic glaze that minimizes waste from sticking to ceramic surfaces. This feature, coupled with the WASHLET PREMIST and TORNADO FLUSH, assists to reduce the frequency of toilet cleanings, minimizing the usage of water, harsh chemicals, and time required for cleaning. The TOTO Supreme II is designed in TOTO's Universal Height, which allows for a more comfortable seat position across a wide range of users. This WASHLET+ includes the WASHLET with water supply adapter, Supreme II bowl and tank set with hardware, and toilet bolt caps. Compatible with T40 WASHLET+ electronic bidet seat and toilet bowl components only. Additional items needed for installation must be purchased separately: wax ring, toilet mounting bolts, and toilet water supply lines.
Features
- WASHLET+ bidet seat and toilet, specially designed to conceal the WASHLET water supply and power cord.
- PREMIST wets the surface of the toilet bowl, aiding in the removal of waste and resulting in a better clean.
- Wand self cleans inside and out with EWATER+ advanced technology
- Adjustable front and rear warm water washing with three temperature settings and five pressure settings. Oscillating stream option
- SoftClose heated seat, automatic air deodorizer, and warm air dryer with three variable settings
- Convenient arm control panel
- 1.28 gallons per flush TORNADO FLUSH system with CEFIONTECT glaze to reduce bowl friction
- Universal Height elongated bowl; ADA, WaterSense, CALGreen, and CEC compliant
- Included parts: WASHLET installation hardware, tank to bowl gasket, tank to bowl hardware, and toilet bolt caps
- Purchased separately: wax ring, toilet mounting bolts, and water supply lines
- Compatible with T40 WASHLET+ components only
| Model No | Width | Weight | Seat Height |
| MS634124CEFG#01 | 17.125 | 104.3 | 17.25 |
| MW6343074CEFG#01 | 18.5625 | 116 | 17.625 |
| MW6343084CEFG#01 | 17.125 | 115.5 | 17.625 |
Manufacturer Resources
MS634124CEF(G)-Spec-Sheet
Product Specs
- ADA Compliant:
- Yes
- Battery Included:
- Yes
- CALGreen:
- Yes
- CEC:
- Yes
- Component Part 1:
- CST634CEFGT40#01
- Component Part 2:
- SW3074T40#01
- Flush Valve Size:
- 3
- Flush lever Location:
- Left
- Rim Height:
- 16.125
- Rough-In:
- 12
- Trapway Diameter:
- 2.125
- WaterSense:
- Yes
- Collection:
- Washlet+
- Battery Type:
- Alkaline
- Product Type:
- Washlet+ Toilets
- Seat Height:
- 17.625
- Product Group:
- Washroom/Bath
- Product Subgroup:
- Toilet
- Product Length:
- 28.375
- Gallons Per Flush (GPF):
- 1.28
- Installation Category:
- Floor Mount/Floor Outlet
- Product Shape:
- Elongated
- Product Height:
- 25.625
- Product Category:
- Washlet+ Toilets
- Product Weight:
- 116
- Product Width:
- 18.5625
- Department:
- Plumbing
TOTO MW6343074CEFG#01 – Frequently Asked Questions
1) Does the TOTO Supreme II toilet come with everything needed to install it?
Not everything. The carton has the WASHLET with its water supply adapter, the bowl and tank set with tank-to-bowl gasket and hardware, WASHLET installation hardware, and bolt caps. You still have to buy the wax ring, toilet mounting bolts, and the water supply lines separately. Budget those in on every unit if you're outfitting multiple bathrooms.
2) Is the TOTO Supreme II an ADA compliant toilet height?
Yes. The Supreme II is built to TOTO's Universal Height and is ADA compliant, with a 17-5/8 inch seat height on the WASHLET-equipped versions and a 16-1/8 inch rim height. That puts the seat in the 17 to 19 inch band ADA calls for on a water closet. It's also WaterSense, CALGreen, and CEC compliant at 1.28 GPF.
3) What is the difference between the Supreme II WASHLET+ Connection Only version and the ones with a C2 or C5 seat?
Three ways to buy the Supreme II. MS634124CEFG#01 is Connection Only: the bowl and tank, plumbed and prepped to hide a WASHLET+ cord and hose, but no bidet seat in the box. MW6343074CEFG#01 ships with the WASHLET C2 seat, and MW6343084CEFG#01 ships with the C5. Buy Connection Only when you're standardizing the fixture now and adding seats later, or when the tenant is supplying the seat. Just note it only accepts T40 WASHLET+ seats and bowl components.
4) Can I put any bidet seat on the TOTO Supreme II WASHLET+ bowl?
No. The Supreme II WASHLET+ bowl takes T40 WASHLET+ electronic bidet seats and T40 bowl components only. The whole point of the design is that the water supply hose and power cord run concealed behind the seat, and that routing is specific to the T40 connection. A generic aftermarket bidet seat will not pick up the concealed supply, and you'd lose the clean installation you paid for.
5) How much space does the TOTO Supreme II one-piece toilet take up in a small bathroom?
Overall footprint runs 28-3/8 inches long, 18-9/16 inches wide, and 25-5/8 inches high. Cased weight on the C2 configuration is 116 pounds, which is a two-person set in most cases. It's an elongated bowl, so check your clearance to the vanity or the swing of the door before you commit in a tight half bath.
6) Does the Supreme II WASHLET toilet still flush if the power goes out?
The flush is mechanical and unaffected. The Supreme II uses a 3 inch flush valve with a manual trip lever on the left side, so a power loss doesn't stop it from flushing at 1.28 gallons. What you lose is the electronic side of the WASHLET: the warm water wash, heated seat, dryer and deodorizer. The unit ships with an alkaline battery for the remote.
7) Is a 1.28 gallon toilet going to clog in a high traffic building?
The Supreme II is built around that concern. It's a 1.28 GPF fixture with a 2-1/8 inch trapway and TORNADO FLUSH, a hole-free rim with dual nozzles that spins the water around the bowl instead of dumping it down the sides. CEFIONTECT ceramic glaze keeps waste from bonding to the surface, and the WASHLET PREMIST wets the bowl before each use. For property managers, the practical payoff is fewer cleanings and less chemical per fixture.
8) Does a WASHLET+ toilet need a dedicated electrical outlet behind it?
An outlet is required, and where you put it matters. The WASHLET is an electric seat, so it needs power at the fixture; the WASHLET+ design routes that cord and the water supply hose concealed behind the unit rather than leaving them exposed on the floor. Rough the receptacle in behind the toilet during framing or trim-out. If the electrical isn't there yet, the Connection Only bowl, MS634124CEFG#01, lets you set the fixture and add the seat once power is run.
9) What is the difference between the WASHLET C2 and the C5 on the Supreme II?
Both are C Series WASHLET+ seats from the same redesigned family, and both give you soft rear spray, rear cleanse and front cleanse with an oscillating stream, three water temperature settings, five pressure settings, a heated SoftClose seat with three temperature settings, warm air dryer, automatic deodorizer, and an arm control panel. The C2 is MW6343074CEFG#01 and adds EWATER+, which electrolyzes the water to clean the wand inside and out before and after every use. The C5 ships as MW6343084CEFG#01.
10) What finish does the Toto Supreme II come in?
Cotton White is the only finish offered on the Supreme II WASHLET+, across all three configurations. That's TOTO's #01 color code, which is why every model number ends in #01. If you're matching to existing TOTO fixtures in a building, #01 Cotton White is the reference.
11) What are the component part numbers inside a Supreme II WASHLET+ package for ordering a replacement?
The WASHLET+ package breaks into two TOTO components: the bowl and tank set is CST634CEFGT40#01, and the WASHLET seat is SW3074T40#01. Those are the numbers to quote if you need to replace just one half of the assembly rather than the whole fixture. Both carry the T40 designation, which is what ties the seat to the concealed-supply bowl.
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Does the TOTO MW6343074CEFG#01 come with a warranty?
Absolutely. The TOTO MW6343074CEFG#01 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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