Installed at the cold water inlet of the water heater, this prefilter filters and purifies incoming water to protect the heater and improve reliability. Key benefits Protects the water heater by filtering impurities from the cold water supply Filters sediment, red worms, algae and other impurities to double protect washing machines, smart toilets, and other hotwater appliances Helps prevent scale and blockages by keeping water cleaner during heating, reducing potential damage to the heater and preserving shower performance What it does Prefilter design targets contaminants before water enters the inner tank, helping to maintain efficiency and extend heater life Reduces mineral buildup and impurityrelated issues that can affect hot water quality and appliance performance Why you need it In areas with noticeable sediment, algae, or other impurities, filtered input water minimizes the risk of scale formation in the heater Protects connected appliances that rely on hot water, such as washing machines and smart toilets, by reducing contaminant exposure 23 practical use scenarios Scenario 1: Households with older or hard water supply rely on a water heater; install the prefilter to reduce sediment and protect the heater core Scenario 2: Homes with washing machines and smart toilets that frequently use hot water; the filter provides additional protection for these appliances Scenario 3: Properties located in areas prone to algae or particulate contamination; filtration helps maintain cleaner water entering the heater Notes Installation is designed for the coldwater inlet of standard residential water heaters The description reflects function and purpose without adding or omitting specifications beyond the original scope