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Geberit Sigma Concealed Tank for Back-To-Wall Toilets

Dual Flush 1.28 GPF / 0.8 GPF

Requires Less Space Than A Standard Toilet, Enhancing Safety And Comfort

Choose Between 2X4 or 2X6 Stud Version

Compatible With Duravit ME By Starck Back To Wall Toilet

Pair with stylish Sigma series flush actuators; Order Separately



Available on backorder

Estimated Delivery Time: 1 - 3 Days


Geberit concealed tank offer many of the benefits of our in-wall toilet system. It’s just the thing to replace a standard toilet when a wall-hung toilet is not possible or practical. All the working parts, including the tank and fill and flush valves, are safely and beautifully concealed inside the wall. Make a bold design statement in any bathroom!

When you pair a Geberit installation system with a compatible floor-mount washdown toilet like Duravit Me By Starck, you get these benefits:

  • Design freedom – choose a toilet bowl from any leading ceramic manufacturer; pair with stylish Sigma series flush actuators or compatible flush buttons
  • Improved accessibility – requires less space than a standard toilet, enhancing safety and comfort
  • Water savings – built-in dual-flush: choose 1.28 / 0.8 GPF  to save thousands of gallons of water every year
  • Superior function – engineered Geberit fill and flush valves eliminate problematic chains and flappers that corrode and fail
  • For proper stud construction (wood or steel) water supply connection, drainage and venting requirements see installation instructions (links below)
  • Includes Geberit Sigma concealed tank, water supply stop, drainage elbow, fill and flush valves pre-installed; mounting hardware
  • Requires compatible flor-mount toilet bowl to complete installation.
  • Pair with stylish Sigma series flush actuators or compatible remote flush buttons (order separately)


You can download the installation instruction sheet for 2X6 Wall Here & 2X4 Wall Here.

To find out more information about Duravit products warranty terms and conditions please click here.

For more specification please see the technical sheet below;

SKU: 109.781.00.1 – 109.307.00.5



Additional information

Weight 5 kg
Dimensions 65 × 44 × 12 cm
For Wall Type

2X4, 2X6



Geberit is a Swiss multinational group specialized in manufacturing and supplying sanitary parts and related systems. It is a leader in its field in Europe with a global presence through its subsidiaries.


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