Inhibits Limescale: The polyphosphates inside help prevent limescale formation by inhibiting the precipitation and binding of calcium and magnesium ions. This innovative technology creates a protective layer within your showers, water heaters, and plumbing systems, keeping them safe from scale buildup and extending their lifespan. Food-grade Safe Materials：Our under sink system is FCC-tested and certified to effectively prevent scale buildup, keeping your appliances protected and performing at their best. Made with food-grade materials, it ensures safe, pure, and healthy water for your entire family. Fast Flow: Delivers a flow rate of up to 10 gallons per minute and lasts up to 6 months. The enhanced surface area minimizes clogging and ensures consistent water flow from start to finish, providing an exceptional experience every time. After-Sales Support: MIZUDO offers comprehensive after-sales service for the house water filter system, ensuring full support for the product from installation to regular use. If you encounter any quality or installation issues during use, please feel free to contact us. Replacement Model: Compatible with 3M Aqua-Pure AP430, AP430SS, and SF18-S scale inhibition systems. Interchangeable with 3M Aqua-Pure AP431, HF8-S, and KleenWater KW431. Note: This package includes only the filter cartridge; connectors are not included. For proper operation, install the system on the cold water line that supplies the water heater. MIZUDO whole house scale inhibitor and water heater softener system protects hot water heaters and pipes from scale buildup. This under-sink water softener uses food-grade phosphates to reduce scale buildup by dissolving calcium and magnesium ions, while also removing rust. Featuring a durable plastic housing, the water heater softer is designed to prevent leaks. Its intricate thread design ensures a perfect fit, while crack-resistant materials provide enhanced reliability. Delivering a flow rate of 10 GPM, this system ensures consistent performance and only requires replacement every 6 months. Compatible with 3M Aqua-Pure AP430, AP430SS, and SF18-S systems, this versatile filter prevents scale buildup and enhances appliance efficiency.