Geberit Sigma8 In-Wall Cistern

The Geberit Sigma8 is a concealed cistern system designed for wall-faced floor-mounted toilet pans, combining a durable HDPE tank, strong support structure and water-efficient dual-flush technology. With compatibility for S-trap and P-trap configurations, a 90mm wall installation and extensive Sigma flush-button options, it provides a versatile solution for modern bathroom projects.

Key Features & Benefits

• Designed for Wall-Faced Floor Pans – Compatible with all Mercio wall-faced floor-mounted toilet pans.
• WELS 4-Star Rated – Provides efficient water consumption with a 4.5L/3L dual-flush system.
• One-Piece HDPE Tank – High-density, impact-resistant construction provides durability and reliable concealed performance.
• Leak-Resistant Construction – Designed for dependable long-term operation behind the wall.
• S-Trap & P-Trap Compatible – Provides flexibility for different toilet plumbing configurations.
• 90mm Wall Compatible – Designed to fit standard 90mm wall structures.
• 400kg Load Capacity – Provides strong structural support for the toilet installation.
• Easy Servicing Access – The dual-flush plate provides access to internal components for maintenance.
• Wide Operating Pressure Range – Suitable for water pressures from 10–1000kPa.
• AS 1172.1 Compliant – Designed to comply with the relevant Australian standard.
• Flexible Flush Button Options – Compatible with mechanical and pneumatic Sigma buttons, with electronic options available.
• 30+ Flush Button Designs – Provides extensive styling options to coordinate the flush plate with your bathroom.

Specifications

Durable Concealed Construction

The Sigma8 features a one-piece, high-density HDPE tank designed to withstand impact and provide dependable performance within the wall cavity. Its concealed configuration keeps the cistern hidden while maintaining access through the flush plate for servicing.

Flexible Installation & Styling

The system supports both S-trap and P-trap toilet pans, making it adaptable to different bathroom layouts. Its compatibility with the Sigma range of mechanical and pneumatic buttons, as well as optional electronic controls, allows the visible flush plate to be selected according to the bathroom's design.

With more than 30 flush-button designs, homeowners and designers can coordinate the flush plate with other bathroom finishes and fittings.

The Geberit Sigma8 In-Wall Cistern is a versatile choice for wall-faced floor toilets, offering 4.5L/3L water-efficient flushing, durable HDPE construction, 400kg load support and flexible installation and styling options.