Preserve and protect household plumbing and water-using appliances with the Culligan® HF-150A Whole House Sediment Water Filter. Installed on the 3/4-inch 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 when necessary. Filter must be protected against freezing. Because water quality varies among locations, the HF-150A is sold without a filter cartridge. There are several replacement cartridges to choose from including; Culligan® model S1A, CW-MF, CW-F, P5 and P1. The filter comes with a 5-year warranty. Wrench TV# 504434, For Replacement Cartridges Use TV#'s 529286, 583393, 583401, #614800 & 802304, Not Included. O-Rings Use MFG # OR34, TV# 504206.