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TOTO CST646CEMFGNAT40#01 Aquia IV Toilet Specifications
- Length (in.): 27.625
- Width (in.): 15.1875
- Height (in.): 28.375
- Weight (lb): 118
- Rim Height (in.): 16.125
- ADA Compliant: No
- WaterSense Certified: Yes
- CalGreen: Yes
- CEC: Yes
- Mounting/Installation: Floor Mount/Floor Outlet
- Water Consumption (GPF): 1.28/0.9
- Flush Lever Location: Center
- Rough-in Size (in.): 12
- Flush Valve (in.): 2.5
- Trapway Diameter (in.): 2.5
- Shape: Elongated
- Material: Vitreous China
- Warranty: Manufacturer One Year Limited
- Category: One-Piece Toilets
- Finish: Cotton White
- UPC Code: 739268423411
TOTO CST646CEMFGNAT40#01 Aquia IV Toilet Documentation
*This product is in TOTO's "cotton white" color – which is your regular clean white that will match other white bathroom fixtures.
TOTO CST646CEMFGNAT40#01 Aquia IV One-Piece Dual Flush Washlet+ and Auto Flush Ready Universal Height Toilet
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Frequently Asked Questions
• What if my order arrives damaged?
While we take great care in the packaging and handling of orders, we ask that customers inspect all shipments within 48 hours of delivery, and in the rare event that your order arrives damaged, please send us an email with a photo showing the damages (so we can file a claim with the carrier), and let us know whether you prefer a free replacement or a refund.
• What about the seat height?
Most standard toilets are 16-17 inches from the floor to the top of the seat, or about 15 inches to the bowl rim. Universal height (or comfort height) toilets, like the one you're looking at, are roughly an inch taller—around 16 inches from the floor to the bowl rim, or 17-18 inches to the seat. Universal height toilets are designed to provide greater comfort for a wider range of users, making it easier to sit and stand, especially for older adults. Keep in mind that while universal height is one of the requirements for ADA compliance, other factors also come into play.
• Is the seat included?
Unfortunately, this toilet does not include a seat. Above is a link to a matching TOTO SoftClose seat you can add to your order, but any elongated toilet seat should also fit this toilet.
• Will I regret not choosing a toilet with a higher flush volume?
Unlikely. TOTO has been working on flushing technologies as if their livelihood depends on it – and in some places, it does. The truth is, it's more about engineering than just volume – think of a car with a smaller engine that can go faster than one with a larger one. TOTO's Tornado Flush technology uses 3-inch flush valves (instead of traditional flappers) to force water into dual nozzles, creating powerful cyclonic rinsing action. This causes the water to spin in a vortex inside the bowl, making sure every part of it is thoroughly cleaned. The pressure from the nozzles improves both cleansing and bowl evacuation. Other innovations include fully glazed, extra-smooth trapways that prevent debris from sticking, extra-large siphon jets, and seamless, concave rim designs – all working together to make this toilet's flush more than enough for jobs of all magnitudes.
• What is this Washlet+ stuff?
This toilet is Washlet+ compatible. Washlet+ compatible toilets have a special channel (a strategically placed hole) on the bowl surface to help conceal a bidet seat's supply line and power cord for a cleaner look. Other than that, it functions as a standard toilet, and you can use it without a washlet. A washlet will also work with a non-Washlet+ toilet, but the wires will be visible.
The TOTO T40 Aquia IV One-Piece Elongated Dual Flush 1.28 and 0.9 GPF Universal Height WASHLET+ and Auto Flush Ready Toilet with CEFIONTECT is the epitome of modern form and function. The skirted design conceals the trapway, which enhances the elegant look of the toilet and adds an additional level of sophistication.
The one-piece design is not only aesthetically pleasing, but also offers the benefit of being easier to clean versus a two-piece toilet. By removing the gap between the tank and bowl, we eliminate the hiding place for dirt and debris. An additional benefit of the one-piece toilet is that there is no threat of leaks from bolts or gaskets that can occur in two-piece toilets.
The Aquia IV features TOTO's DYNAMAX TORNADO FLUSH, utilizing a 360 degree cleaning power to reach every part of the bowl. This version of the Aquia IV includes CEFIONTECT technology, a layer of ceramic glaze that minimizes waste from sticking to ceramic surfaces. This feature, coupled with DYNAMAX TORNADO FLUSH, helps to reduce the frequency of toilet cleanings, minimizing the usage of water, harsh chemicals, and time required for cleaning. The enhanced design of the Aquia IV inner bowl reduces water flow resistance and turbulence, resulting in a quieter flush.
The chrome center-mounted push button that sits atop the tank allows you to proactively conserve water by choosing between a 0.9 GPF rinse or 1.28 GPF for tougher jobs. This version of the Aquia IV offers TOTO T40 WASHLET+ and Auto Flush compatibility for when you are ready to upgrade. WASHLET+ toilets feature a channel on the bowl surface to help conceal your WASHLET+ supply line and power cord for seamless integration.
The Universal Height design allows for a more comfortable seat position across a wide range of users. The TOTO Aquia IV meets the standards for EPA WaterSense, and California's CEC and CALGreen requirements.
The Aquia IV comes ready for install into a 12" rough-in, but may be adapted for a 10" or 14" rough-in with the purchase of a separately sold adapter. Does not include seat or WASHLET.
Additional items needed for installation and use must be purchased separately: compatible WASHLET or seat, wax ring, toilet mounting bolts, and water supply lines.
TOTO CST646CEMFGNAT40#01 Aquia IV Toilet Features
- DYNAMAX TORNADO FLUSH utilizes 360 degree cleaning power to reach every part of the bowl
- Highly efficient dual flush system promotes water conservation
- CEFIONTECT ceramic glaze minimizes waste from adhering to ceramic surfaces
- Bowl design reduces water flow resistance and turbulence, resulting in a quieter flush
- Completely skirted design for a sleek and understated look
- Elongated one-piece toilet, easier to maintain versus a two-piece toilet
- TOTO WASHLET+ upgrade compatibility: designed to work with a T40 WASHLET+ bidet seat for seamless integration
- Lid-top chrome dual flush push button - Select 1.28 or 0.9 GPF
- Universal Height allows for more comfort across a broader range of individuals
- WaterSense, CALGreen, and CEC compliant
- Does not include toilet seat or WASHLET
- 12" Rough-in
- May be adapted for 10" or 14" rough-in with optional TOTO parts: TSU48.10 or TSU48.14 (sold separately)
- Included parts: tank to bowl gasket, tank to bowl hardware, and toilet bolt caps
- Purchased separately:: Wax ring, toilet mounting bolts, water supply lines, T40 WASHLET+ bidet seat or compatible toilet seat SS124 or SS234, and optional Auto Flush kit
Click here for the TOTO Washlet compatibility chart