The Pentek 150166 Standard Whole House Water Filter System can extend the life of washing machines, water heaters and other household appliances by reducing sediment before it reaches them. It can also be used with carbon filters to reduce unpleasant taste and odor issues. The filter housing is built with thick walls for increased strength, while leaking and clogging is prevented with a dynamically sealing, self-cleaning o-ring. The Valve-in-Head design saves you money, since no additional shut-off valves are required for operation. The 150166 accommodates a wide variety of filter cartridges; simply purchase the 20-inch x 2.5-inch filter of your choice.