The water heater heats cold water in its inner tank to provide hot water. If the incoming water is of poor quality and contains sediment or particles, prolonged heating to high temperatures can cause limescale deposits and blockages in the inner tank, which may damage the heater and affect the shower. A pre-filter installed on the cold water inlet filters and cleans the incoming water, protecting the water heater. The filter targets sediment, red worms, algae and other impurities to provide double protection for washing machines, water heaters, smart toilets, and other fixtures. Key benefits - Reduces risk of limescale and blockages - Extends the life of the water heater and connected appliances - Improves reliability of hot water supply and shower performance Compatibility and usage - Designed for the cold-water inlet of residential water heaters - Suitable for use with washing machines, smart toilets and other connected systems Use scenarios - Hard-water homes: prevent scale buildup in the water heater and on fixtures - Areas with visible sediment or algae in the supply: filter before contacting appliances - Multi-appliance protection: install to guard washing machines, water heaters, and smart toilets Notes - Inline pre-filter installation on the cold water line - No additional modifications needed for compatible fixtures