Energy-saving building water supply and drainage device

The utility model discloses an energy-saving building water supply and drainage device, which belongs to the technical field of building water supply and drainage and comprises a device body, a sewer pipe cover is arranged on the upper end face of the device body, a filter screen is arranged below the sewer pipe cover, and two sides of the filter screen are connected with sliders. The two sliding blocks are slidably connected to the inner walls of sliding grooves formed in fixing frames arranged on the inner wall of the device body, threaded rods are arranged at the upper ends of the two fixing frames, rotary knobs are connected to the upper ends of the threaded rods, a sedimentation tank is arranged below the filter screen, a fixing insertion rod is arranged on one side of the sedimentation tank, and the outer wall of the fixing insertion rod is sleeved with a baffle. An impurity pipe opening is formed in the front side of the sedimentation tank, and a switch valve is arranged at the upper end of the impurit