Flush valve GEBERIT Dual Type 240, model 136.907.21.2 for concealed cisterns

The GEBERIT Flush Valve Dual Type 240, model 136.907.21.2 for concealed cisterns is a replacement flushing mechanism engineered for compatible Geberit concealed cistern systems. It provides two-stage flushing control that enables a partial or full flush to reduce water consumption while maintaining reliable discharge performance. The unit is intended as a direct replacement in compatible installations and is manufactured to fit within concealed cistern assemblies used in residential and commercial bathrooms.

Advantages

The dual flush design delivers selectable partial and full flush volumes to help conserve water without compromising cleaning performance. Precision-engineered components ensure a tight seal and consistent operation, reducing the risk of leak-related water waste. The valve is designed for straightforward integration with Geberit concealed cisterns, offering durability and stable flushing action over extended service life.

Suitable for

• Replacement of a worn or damaged flush valve in compatible Geberit concealed cisterns
• Residential bathrooms looking to control water usage with dual flush functionality
• Commercial washrooms requiring reliable concealed cistern components for retrofit or maintenance
• Plumbing repairs and scheduled maintenance of wall-hung toilet systems

Key specifications

• Dual-stage flushing mechanism with partial and full flush operation
• Designed for concealed cistern integration
• Sealing elements engineered for leak-free performance
• Durable construction suitable for long-term operation in sanitary installations
• Compatibility with Geberit concealed cistern systems (verify model fit before installation)

How to use

Before installation, isolate the water supply and empty the cistern. Remove the access plate or flush plate to reach the existing valve assembly, then detach the old flush valve following the cistern manufacturer’s guidance. Install the replacement valve into the cistern opening, ensuring seals and connections are seated correctly to prevent leaks. Reconnect the water supply and test both partial and full flush settings to confirm correct operation and adjust as required according to the cistern service instructions.

Usage recommendations

Verify compatibility with your specific Geberit concealed cistern model prior to purchase. Use original manufacturer spare parts or equivalent components and follow local plumbing codes. If uncertain about installation steps, consult a qualified plumber to ensure proper fitment and to avoid damage to the cistern or surrounding finishes.