Quooker Scale Control R Limescale / Hard Water Unit | SCREasy to replace Extends the lifespan of your Quooker in hard water areas Prevents limescale build up in the Quooker tank Height: 420 mm Diameter: 130 mm Maximum operating pressure: 8. 0 bar Quooker Scale Control R Limescale Hard Water Unit The Scale Control R is designed to extend the lifespan of your Quooker tank. It is the most reliable de scaler for Quooker systems and improves the taste of water in hard water areas. The Scale Control R consists of