During installation extra care must be taken to avoid damaging the fittings. Manufacturer provide a 20 Year Guarantee against faulty workmanship or materials (excluding serviceable parts), providing they have been installed, cared for and used in accordance with our instructions. Features and Benefits - Combining the elegance of traditional styling with the precision and technology of modern day design - Accurate flow control - Thermostatic control to +/- 2-3 degree celcius even if the water pressure fluctuates - In the event of hot or cold water failure, the valve will shut down the water supply providing full thermal protection and prevents scalding - The patented cartridge is highly resistant to calcium build up - even in hard water areas - The valves are suitable for.