Toto CST416M#51

Ebony Aquia II Two Piece Elongated Dual Flush Toilet with Dual-Max 1.6 or 0.9 GPF Flush

Item # BCI582421   |   Model # CST416M#51   |  Aquia Collection

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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

Additional Toto Links

This Toto item can also be referenced by the following color/finish specific model #:

  • Toto CST416M#03
  • Toto CST416M#11
    Colonial White
  • Toto CST416M#01
  • Toto CST416M#51
  • Toto CST416M#04*
  • Toto CST416M#12
    Sedona Beige

*Discontinued model or finish

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Product Videos

  • How to remove and install a Toilet
    If you have been considering replacing your toilet, yet are wondering how complicated of a job this is? Take a moment and we'll show you just how simple this job can actually be.
  • TOTO Toilet Flush Testing
    Take a moment to see just how TOTO takes flush testing seriously.

Installation Resource Center

Whether you are installing the product yourself or hiring a professional, our installation Resource Center has everything you need to get your project done. Visit the Installation Resource Center to get started.

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