This prefilter is installed at the coldwater inlet of the water heater and filters and purifies water before it reaches the heater, helping to protect the unit. Key benefits Reduces sediment, particles, algae, red worms, and other impurities to protect the water heater and downstream fixtures. Prevents scale and blockage in the inner tank that can occur after long heating cycles, helping maintain hot water quality and shower performance. Provides double protection for connected appliances such as washing machines and smart toilets. How it helps The water heater generates hot water by heating cold water in the inner tank. When water quality is poor, impurities can form scale during temperature heating, potentially damaging the heater and affecting the shower. By filtering impurities before heating, the prefilter minimizes buildup and blockage, supporting longer heater life and more consistent hot water. Use scenarios Scenario 1: In homes with variable water quality, install to protect the water heater and maintain steady shower performance. Scenario 2: Use to shield washing machines and smart toilets from sediment and other impurities that travel through the hot water supply. Scenario 3: Ideal for households with multiple hotwater appliances that rely on clean water to prevent scale and improve overall reliability.