Culligan 3/4 In. Whole House Sediment Water FilterUsed to preserve and protect household plumbing and water using appliances, water heater, water softener, fixtures, and faucets with the Culligan sediment filter. Installed on the 3 4' main water line at the point of entry, this filter housing features a pressure relief button used at cartridge change time. The UV resistant opaque filter material facilitates outdoor installations, where necessary. Because water quality varies among locations, it is