Product Description The Culligan HD-950A large-volume whole house filtration system has four times the capacity of standard duty filter systems. Included with the filter housing is a SW-3A housing wrench and a pressure relief valve. Ideal for private wells, large homes, farms, swimming pools, and spas, this whole house water filter can extend the life of washing machines, water heaters, and other water-using household appliances. With a 1-inch inlet/outlet for installation on main cold-water line, this water filtration comes with a 5-year limited warranty. The HD-950A housing is compatible with Culligan R50-BBS, CP5-BBS, and RFC-BBS filter cartridges. From the Manufacturer Culligan's Heavy-Duty HD-950A sediment housing has two times the capacity of standard 10-inch filters. It is ideal for private wells, large homes, farms, swimming pools, and spas and can extend the life of washing machines, water heaters, and other water-using household appliances. It has a 1-inch inlet/outlet for installation on main cold-water line and includes a housing wrench for filter installation. The unit come with a 5-year limited warranty. The HD-950A housing uses filter cartridges (R50-BBS, CP5-BBS, RFC-BBS) sold separately.