Water filter housing keeps fine particles of sediment, rust, dirt, and scale out of your household plumbing lines Protects and preserves your investments such as water softeners, water heaters, clothes washer, dishwashers, and all your household fixtures and faucets Provides extra capacity for high sediment concentration Integrated pressure relief valve for easy cartridge changes Includes filter housing wrench Made in USA 5 year limited warranty Works with 1 inlet/outlet plumbing systems Level 4 filtration, 25 micron