ISpring Whole House Water Filter, 20″ x 4.5″, Reduces Scale Water Filters, Blue. Protect your household appliances and plumbings from scale. The patented scale prohibitor effectively sequester calcium and magnesium, preventing your pipes from scale and clearing partially clogged piping. Prevent your pipes from corrosion and bio-growth. Our premium filter media inhibit corrosion, particularly iron, steel, galvanized, copper and lead, by coating the surface of your pipes. It serves as a protective layer that makes it harder for bio-film to form. The coating also helps to stabilize chlorine as the chlorine will not react with the metal pipe if the coating exists. Top-Notch Quality: The filter is made of patented scale Inhibitor and is capable of filtering up to 150, 000 gallons of water, or lasting for 12 months (depending on inline water quality). The filter is tested by an independent third-party to meet NSF 42/60 standards. Easy Filter Replacement and Minimum Maintenance Required: For filter replacement, just twist off the housing and replace the filter. With 1″ NPT inlet/outlet and 20″ x 4. 5 filter cartridges, the system has a minimum impact on water flow (up to 15 GPM) and requires minimum maintenance. Our knowledgeable team is available to help you find a filtration solution that best solves your specific water concerns or to help with any after-sale support you may need. Our goal is, and always will be, to maximize your user experience. Description iSpring WDS150K Anti Scale 20 x 4. 5 Whole House Water Filter with Patented Scale Inhibitor. Any product you return must be in the same condition you received it and in the original packaging. Please keep the receipt. We usually respond within 24 hours on weekdays. Thank you for shopping at our store.