HF-360 Whole House Sediment Water Filter Housing, 3/4-In.Preserve and protect household plumbing and water using appliances with the Culligan(TM) HF 360 Whole House Valve in Head Water Filter System. Installed on the 3 4 inch main water line at the point of entry, this filter housing is designed with a convenient built in shut off valve to stop the water flow at cartridge change time. The filter must be protected against freezing. The clear filter housing allows easy monitoring of cartridge life. For ease