Toto CST416M#01 Cotton Aquia II Two Piece Elongated Dual Flush Toilet with Dual-Max 1.6 or 0.9 GPF Flush

Item #: bci582413
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Product Details for the Toto CST416M#01 in Cotton

This product has additional required/recommended options. To configure, add to your cart.

  • Toilet Seat Recommended

Aquia II Dual Flush Toilet

TOTO's Dual-Max flushing system offers the option of a 0.9 Gallon "light flush", or a clog free 1.6 Gallon full flush. TOTO Toilets has been showing the world how to have clog free performance for decades. While other top manufacturers have been working to improve their flush performance, TOTO Toilets have been delivering.

The TOTO Aquia II toilet appeals to designers and homeowners alike with its sleek modern lines. The TOTO CST416M also offers a skirted design for easy cleaning by removing the nooks and crannies where dust and bacteria collect, while the slender tank gives it a heightened sensibility.


  • Elongated skirted design, two piece toilet
  • Dual-Max Flushing System
  • 0.9 gallon "light flush, or a bulk removing 1.6 gallon regular flush
  • Meets and exceeds all low-flow codes and guidelines
  • Push button style flush actuation
  • Excellent rim wash
  • Large, 2-1/8" fully glazed trapway to ensure no hangups
  • 12 Inch Rough-In


  • Bowl Height: 15-3/8 inches
  • Bowl Width: 14-1/4 inches
  • Toilet Height: 30-1/4 inches
  • Toilet Width: 15-1/4 inches
  • Recommended Seat (SS114, SS154, SS204) Not Included
  • CalGreen compliant
  • Watersense Certified
Our SKU: Toto CST416M

This product is listed under the following manufacturer number(s):

*Denotes a finish or option that has been discontinued

Toto CST416M Reviews

Rated 1 out of 5 by from Dual flush is horrible I bought three of these in march of 13, after having a plumber install them, they worked for 3 months now 2 of the three toilets run non-stop. I have been trying to work with toto, but so far their recommendations have been to clean the internal cylinder, which I have done 6x and nothing ever changes. Skip this toilet if you have a choice.
Date published: 2014-01-05
Rated 3 out of 5 by from Mostly Thrilled PRO: style, ease of cleaning, flush power, water-saving CON: noisy peeing, skid marks, and LOUD flush (husband and I have have a rule: NO FLUSH at night) (We still would recommend TOTO. Every time we move, we replace toilets with TOTO. Nothing is better. The Drake doesn't have the same LOUD factor....but I LOVE the clean-ability of this toilet...)
Date published: 2013-11-02
Rated 5 out of 5 by from Nice look great value We bought this toilet for our powder room remodel last year and liked it so much we bought the same model for our master bathroom remodel. The toilet is sleek, taking up much less floor space than the original fixture, with a contemporary but still traditional look. It is easy to keep clean and the dual flush system truly does save water - and ultimately money. The recommended "soft close" lid isn't necessary but is nice to have if you want to spend the extra money.
Date published: 2011-03-23
Rated 5 out of 5 by from the best! best in function, best in looks--exceeds our expectations
Date published: 2010-06-19
Rated 5 out of 5 by from Lean and Green The Aquia II is a compact toilet compared to the Kohler Wellworth it replaced. It is considerably shorter forward of the flange than most toilets. Mounting is rather high-tech and does not bolt directly to the flange. Rather, a mounting adapter with a rubber gasket bolts to the flange with the wax ring between it and the flange. The value here is that if the toilet has to be removed after installation you will not have to replace the wax ring – no scraping ore yucky cleanup before replacement. Four holes must be drilled with the use of the included template at the rear to secure the two nylon mounting blocks (this may a bit of work if you have a ceramic tile floor). Once the mounting blocks are affixed to the floor the toilet can be placed and two fastening screws (with dress center taps) can be set completing the process. A word to the wise – the Aquia requires you to work trough small ports at the back of the lower piece to affix the seat and worm the supply line (you will likely need a longer line than you now have) coming from the tank. This is best done BEFORE the toilet is put in place. As far as the operation of the toilet everything works beautifully. At the top of the tank is a split button for flushing. The left portion is designed for liquid waste, the right for #2. If you are interested in “greenness” this is the perfect toilet. Since liquid flushes far out number solid waste flushes the total amount of water used with this toilet should be considerably less that that utilized by a 1.26 G/F toilet. At the same time the Aquia does not reduce the total water/solids ratio in the line that can lead to sewer line problems in the future.
Date published: 2009-08-31
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20 Questions from the Community
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CST416M does this offer include the tank and toilet?

The Toto CST416M does include both the toilet tank and bowl, though you will need to choose a seat. Hope this information helps. Take care and have a great day!

Is this comfort height?

No, the CST416M is not comfort height. The bowl height is 15 1/4 inches.

Is this rear outlet? What other toto toilets are rear outleted?

The Toto CST416M is not rear outlet toilet. You can view rear outlet toilets by searching the phrase "rear outlet toilet" on our site.

What is the difference between "cotton" and "colonial white"?

Cotton is a pure white color, colonial white has a slight beige/yellow tint to it.

Whats the difference between the CST416M and the CT414?

The CT414 is the bowl only for the CST414M.

Can you tell me how many inch are there in between the center of mounting bolt holes?

The Toto CST416M mounting screws are 5.5" apart.

Does TOTO CST 416M come with seat? Or do I have to buy separate seat? If so, please give some recommendation.

The Toto CST416M requires seat SS204.

do you have toilet rough 10" one piece?

The only one piece 10" rough toilets we have from Toto are commercial grade toilets such as the Toto CT705E.

Do you need to buy the toilet lever separately for this toilet?

The Toto CST416M comes with a push button lever that is located at the top of the tank.

does this require a rough-in? if so, please recommend correct model.

The Toto CST416M comes with the rough in that it needs. You will not need to purchase anything extra.

I want to buy a toto washlet SW844 to go with this toilet, TOTO website said I need a THD 9090 adapter kit, is that true? Can I order it here?

As toto is the expert on their products and we ask they directly about compatability issues. The THU9090 is listed as the necessary adapter kit to use with the Aquia toilets and the E200 series washlets.

Is the cotton color a powder/matt finish or is it polished? Is there a polished white finish for this model?

The Toto CST416M comes in Cotton, which is a bright white.

what are the dimensions of this model?

The Toto CST416M has a width of 14.25", a height of 30.25", an extension of 27.5" and a bowl height of 15.25".

what is comfort height?

Comfort Height is in reference to the height of the seat. It is a taller seat making it easier to get on and off with ease.

What is the main difference between CST416M and CST412MF. Why CST 412MF more expensive?

The CST412MF is a low consumption model.

What is the main difference between CST416M and CST412MF? its not specifically stated below.

The difference between the Toto CST416M and the Toto CST412MF is that the CST412MF is ADA-compliant, and has the seat at 16-1/8" above the floor.

Is the mouting adapter included?

The Toto CST416M does include the mounting hardware.

does this toilet include the 12" rough-in?

The Toto CST416M includes the 12" rough-in.

What are the options for a seat?

The CST416M will work with the SS114, which is soft close, or the SS204.

Is bronze hardware available instead of chrome?

The push button is not available in a bronze finish.

SoftClose Elongated Closed-Front Toilet Seat and Lid
SoftClose Elongated Closed-Front Toilet Seat and Lid
SoftClose Elongated Closed-Front Toilet Seat and Lid

Toto CST416M Technical Specs

Bowl Height 15.25
Bowl Shape Elongated
CA Drought Compliant Yes
Comfort Height No
Concealed Trapway Yes
Configuration Two Piece
Depth 27.5
Flush Technology Dual-Max
Flush Type Dual Flush
Flush Valve Size 3
Gallons Per Flush .9, 1.6
Height 30.25
Installation Type Floor Mounted
Insulated Tank No
Length 27.5
Material Vitreous China
Product Weight 65
Rough In 12
Seat Included No
Theme Modern
Trapway 2.125, 2.13
Trip Lever Placement Top
Water Efficient Yes
WaterSense Certified YES
Width 14.25

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