Aqualisa Opto Thermo Pink Cartridge — 265502
The Aqualisa 265502 Pink Cartridge is a precision-engineered thermostatic component designed specifically for Combi Boiler systems. If your Aqualisa Opto shower is experiencing temperature fluctuations, "kicking" between hot and cold, or leaking when turned off, a replacement cartridge is the professional fix. As official stockists, we provide genuine parts to ensure your shower performs to factory standards while saving you the cost of a full valve replacement.
Crucial Compatibility Note: This PINK cartridge is for use with Combi Boilers ONLY.
Need the Green Cartridge for High Pressure/Unvented systems? Click Here.
Key Features
- Thermostatic Control: Restores precise temperature regulation to your Opto mixer.
- Combi Optimized: Specifically calibrated for the pressure demands of combination boilers.
- Genuine Aqualisa: Ensures perfect spline alignment and seal integrity.
- Eco-Friendly: FixThe...Shower! Repairing your valve reduces landfill waste and saves money.
Important Information
Security Seal: Please note that if the manufacturer’s security seal is broken, we are unable to provide a refund. Please verify your system type before opening.
Installation: A colored regulator should be fitted into the hot inlet of the cartridge, depending on the Kw/BTU rating of your boiler, to ensure optimal flow.



