3/4" Whole House Sediment Water Filter, Installs Easily On 3/4" Main Water Line, Clear Sump, Wrench Included, Patented Shut Off Value in Cap Makes Changing Cartridges Easy, Uses 3/4"Compression, x 3/4" Male Iron Pipe Fitting TV #467-621, For Replacement Cartridges Use TV #'s: 182-025, 529-286, 583-393, 583-401, 614-800 & 802-304, Not Included.