TOTO Aquia 13 1/8" Dual Flush 1.28 and 0.9 GPF Toilet Tank Only with Washlet Plus Auto Flush Compatibility

On Sale:
$204.80 $256.00
(20% Off)
On Sale:
$204.80 $256.00
(20% Off)

Select Finish*

On Sale:
$204.80 $256.00
(20% Off)
Usually Ships in 1 to 2 Weeks
Retailers have the legal right to set their own prices, but some manufacturers place restrictions on how those prices may be communicated. Because our price on this item is lower than the manufacturer's "minimum advertised price," the manufacturer does not allow us to show you our price until you place the item in your cart, or in some cases, proceeding to the final checkout stage. You are not required to purchase the product to see our lowest price, simply just remove it from your cart.


Product overview


Product Specs:

Product Specs

  • Product Type: Toilet Tanks
  • Finish/Color: Black, White, Sedona Beige, Bone
  • Style: Modern/Contemporary
  • Material: Vitreous China
  • Warranty: 1 Year Limited Warranty
  • Made In: USA


H 13 1/8" x L 6 3/8" x W 15 5/8"

About TOTO ST446EMNA Aquia 13 1/8" Dual Flush 1.28 and 0.9 GPF Toilet Tank Only with Washlet Plus Auto Flush Compatibility

Aquia Dual Flush 1.28 and 0.9 GPF Toilet Tank Only with Washlet Plus Auto Flush Compatibility is designed for use with the Aquia IV dual flush bowl. The Aquia IV tank includes a tank to bowl gasket, tank to bowl hardware, and toilet bolt caps. The Aquia IV tank features TOTO''s Dual-Max dual flush option, allowing you to proactively conserve water usage. The chrome center-mounted push button that sits atop the tank allows you to choose between a 0.9 GPF rinse or 1.28 GPF for tougher jobs. This version of the Aquia tank offers TOTO T40 WASHLET and Auto Flush compatibility for when you are ready to upgrade to a hands-free flush system with electronic bidet seat. The Aquia IV tank meets the standards for EPA WaterSense, and California’s CEC and CALGreen requirements.
  • Vitreous china construction
  • Weight: 29 lbs
  • Water Use 0.9 GPF
  • Auto Flush available as upgrade
  • WaterSense, CALGreen, and CEC compliant

Key Features & Innovations


A partnership program of the U.S. Environmental Protection Agency (EPA) makes it easier to save water and protect the environment by identifying high efficiency products that perform well. The WaterSense label was created to encourage manufactures to produce water efficient plumbing fixtures and to develop a system to help consumers recognize these products. that have been performance tested and validated by several agencies.

As members of the EPA’s WaterSense Steering Committee, TOTO water efficiency specialists advised the EPA on developing product performance criteria for the WaterSense program. TOTO products are recognized is part of the EPA’s National Environmental Achievement Track, the “gold standard” for facility-based environmental performance, recognizing environmental excellence by encouraging facilities with strong environmental records to go above and beyond legal requirements. TOTO is also a partner in the EPA’s innovative collaboration with the freight industry to increase energy efficiency while significantly reducing greenhouse gases and air pollution.

  • Qualify as high efficiency toilets (1.28 GPF or less)
  • Have a minimum soybean paste flush score of 350 uncased grams
  • Meet the los angeles department of water and power supplementary pricing specification regarding trim quality and tank volume
  • Have third party testing agencies conducting product performance testing and validation


Established in 1953 by the California Building Standards Law, the California Building Standards Commission (CBSC) is within the Department of General Services under the Government Operations Agency. CBSC members are appointed by the Governor and confirmed by the State Senate.

CBSC's mission is to produce sensible and usable state building standards and administrative regulations that implement or enforce those standards.

Specifically, CBSC:
  • Assists state agencies in producing high-quality amendments
  • Works to repeal unnecessary building regulations and see that ambiguous regulations are more clearly written
  • Assists various constituents and special interest groups in making their needs known to various code-writing departments
  • Administers a public appeal process
  • Educates the public about the state's building code, and helps them to understand and comply with it
  • Ensures Title 24 is published with minimal errors

This product has the following variations:

SKU Description Price
ST446EMNA#01 With Finish: Cotton White $204.80
ST446EMNA#51 With Finish: Ebony $294.80
ST446EMNA#11 With Finish: Colonial White $204.80
ST446EMNA#12 With Finish: Sedona Beige $231.80
ST446EMNA#03 With Finish: Bone $231.80

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