Drain coupling for concealed cistern CERSANIT K97-166, connection diameter 90 mm

CERSANIT drain coupling K97-166 is a replacement and installation component designed for concealed flush cisterns and in-wall frames. It provides a secure connection between the cistern outlet and the building waste pipe with a 90 mm connection diameter. The coupling is intended for use in systems where a 90 mm outlet interface is required, enabling reliable wastewater discharge and straightforward integration into compatible CERSANIT installations.

Advantages

The coupling offers a robust interface for wastewater flow with consistent 90 mm diameter alignment, minimising installation errors and ensuring stable sealing between the cistern outlet and waste pipe. Its design supports straightforward replacement or retrofit operations without the need to modify surrounding in-wall frame components. The component is compatible with common concealed cistern configurations and simplifies maintenance by providing an accessible, standard-dimension connection point.

Suitable for

• Replacement of worn or damaged drain couplings in concealed flush cisterns
• Installation of in-wall frames and concealed cisterns requiring a 90 mm outlet
• Servicing and repair work on compatible CERSANIT concealed systems
• Retrofit projects where an existing outlet must be adapted to a 90 mm waste pipe

Key specifications

• Connection diameter: 90 mm
• Application: concealed flush cisterns and in-wall frames
• Function: coupling between cistern outlet and waste pipe for wastewater discharge
• Mounting: in-line connection designed for standard concealed cistern interfaces

How to use

Position the drain coupling to align the cistern outlet with the waste pipe, ensuring the 90 mm diameters are concentric. Follow the cistern manufacturer’s installation instructions for securing the coupling and sealing interfaces to prevent leaks. Use appropriate sealants or gaskets where specified by the cistern or plumbing guidelines and verify the connection is firm before closing the wall or finishing the installation. Test the system by flushing and inspecting for any signs of leakage or misalignment.

Usage recommendations

Use the coupling as part of a complete concealed cistern installation or repair, and check compatibility with the cistern and in-wall frame model prior to fitting. If uncertain about fitment or sealing methods, consult installation instructions or a qualified plumber to ensure correct installation and long-term performance.