QUICK Designed to protect domestic plumbing systems against limescale build up. The QUICK is suitable for houses of up to four bedrooms, and for combination boilers as well as vented and unvented cylinders. The QUICK is designed to protect against hard limescale deposits in domestic pipelines and on heating elements and surfaces, to protect appliances such as dishwashers and washing machines, and to make limescale-stained taps, sinks and bathtubs easier to clean. The QUICK is the solution for hard limescale deposits in the home. It is designed to protect your heating system, as well as appliances such as dishwashers and washing machines, and to make limescale-stained taps, sinks and bathtubs easier to clean.