HELPS PROTECT HOT WATER HEATERS: Polyphosphates, included in this product, help to inhibit scale buildup in hot water heaters (both standard (gas or electric) and tank-less styles) and boilers. Helps extend the life of hot water heaters and hot water using appliances, pipes, and downstream plumbing fixtures such as faucets and shower heads. Designed for use with 3M Aqua-Pure Whole House Scale Inhibition Inline Water System AP430SS HELPS PROTECT HOT WATER HEATERS: Polyphosphates, included in this product, help to inhibit scale buildup in hot water heaters (both standard (gas or electric) and tank-less styles) and boilers. Helps extend the life of hot water heaters and hot water using appliances, pipes, and downstream plumbing fixtures such as faucets and shower heads. MAINTAINS EFFICIENCY: By inhibiting scale buildup on heat elements, helps maintain water heater efficiency. EASY TO REPLACE: Easy change-out makes system maintenance easy. HIGH FLOW RATES: Rated for up to 10 gallons per minute (gpm). PRODUCT SPECIFICATIONS: System has a pressure range of 25-125 PSI (862 kPa) and operating temperature of 40-100F (4.4-37.8C). Inhibits scale buildup and corrosion High capacity change every 4-6 months