Note: The prefilter is installed on the cold water inlet of the water heater. It filters and purifies the water to protect the water heater. Why you need it: If the incoming water quality is poor and contains sediment or particles, heating can cause scale buildup and blockages inside the inner tank. This can damage the water heater and affect shower performance. What it filters: sediment, red worms, algae and other impurities. This helps provide cleaner hot water and protects connected appliances. Benefits and outcomes: reduces scale and clogging risk, extends water heater life, lowers maintenance, and helps maintain steady hotwater performance for showers. Secondary protection: provides additional filtration for other appliances such as washing machines and smart toilets, offering double protection. Use scenarios: Home with noticeable sediment or particle contamination in the coldwater supply, to safeguard the water heater and improve shower experience. Households with multiple waterusing appliances (washing machines, smart toilets) to protect these devices from impurities. Rentals or homes with variable water quality where a simple inline filtration solution helps maintain overall appliance performance. Installation note: installed on the coldwater line of the water heater.