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TOTO ST784E Eco Clayton 21 1/8" 1.28 GPF Single Flush Toilet Tank

Product Code: ST784E


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$238.40 $298.00
(20% Off)

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About TOTO ST784E Eco Clayton 21 1/8" 1.28 GPF Single Flush Toilet Tank

The TOTO Eco Clayton E-Max 1.28 GPF Toilet Tank is designed for use with the Eco Clayton 1.28 GPF bowl. The Eco Clayton tank features TOTO's E-Max flush technology, featuring a 3'' wide flush valve. The Eco Clayton tank comes equipped with a decorative color-matched and chrome left-hand trip lever. The Eco Clayton ST784E tank can be used on the C784EF toilet bowl.
  • Vitreous china construction
  • Water Use: 1.28 GPF
  • E-Max flushing system
  • Left hand chrome trip lever
  • Includes tank trim and coupling components

Key Features & Innovations


The E-Max flushing system provides a consistent and powerful flush using a combination of a wide 3" valve and an extra-large siphon jet. The innovative system is quiet and simple and uses only 1.28 Gallons Per Flush. This amounts to a considerable water savings every day.

  • Large siphon jet
  • Powerful, quiet flush
  • Pilot-operated fill valve
  • Clean shutoff at any water pressure


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

This product has the following variations:

SKU Description Price
ST784E#11 With Finish: Colonial White $238.40
ST784E#12 With Finish: Sedona Beige $269.20
ST784E#51 With Finish: Ebony $342.70
ST784E#03 With Finish: Bone $269.20
ST784E#01 With Finish: Cotton $238.40
L 21 1/8" x W 8 1/8"
Spec. Value
Product Type Toilet Tanks
Finish/Color Copper, White, Pewter, Brushed Nickel
Style Transitional
Material Vitreous China
Warranty 1 Year Limited Warranty
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