Ideal Standard Tresa Thermostatic Cartridge — A861787NU
Genuine Spare Temp Control High Precision
The A861787NU (FTB13723) is the official Ideal Standard thermostatic element designed specifically for the Tresa suite. Engineered to provide accurate temperature blending, this cartridge features a high-grade wax thermoelement that reacts instantly to pressure changes. It is the essential fix for showers experiencing temperature "drifting" or complete loss of thermal control.
Verified Compatibility
This cartridge is specifically for use with the following Tresa models:
- A7255: Tresa Thermostatic Built-in Valve
- A7256: Tresa Thermostatic Built-in Valve with Diverter
Maintenance Advice
Limescale is the primary cause of thermostatic failure. When installing your new cartridge, we recommend checking the non-return valves (filters) within the shower body. Cleaning these of any grit or scale ensures your new cartridge can accurately mix the water supply.
Technical Specifications
- Part Code: A861787NU / FTB13723
- System Type: Suitable for High & Low pressure systems
- Function: Thermostatic mixing and safety anti-scald shut-off
- Material: High-performance brass and polymer construction