The Whole House Full-Flow Sediment Filter is designed to remove rust, sand and all particulates larger than 20 microns (a human hair is about 70-100 microns) without reducing or restricting the full flow of water (up to 20 gpm) to your household. The "Big Blue" Housing uses large 4-1/2" x 10" long-lasting filters, 2 included. Inlet and Outlet are large 1" ports and it comes with a built-in pressure relief valve in the cap to simplify filter changes. We supply 2 long-lasting 20 micron filters ( WR105 ), a heavy-duty mounting bracket, stainless-steel screws and a housing wrench for easy filter changes. The WD001 measures a hefty 7-1/4"D by 14-1/2" tall. Ships FREE in continental US. Retail Price: $149.00