Auxiliary filtering device for building water supply and drainage

The utility model relates to the technical field of building drainage, in particular to an auxiliary filtering device for building water supply and drainage, which comprises a treatment box, the four corners of the front end of the treatment box are fixedly connected with a box door through fixing bolts in a threaded manner, the number of the fixing bolts is four, a clamping groove is formed in the middle of the lower box wall of the treatment box, and a clamping device is clamped in the clamping groove. A filtering device is slidably connected between the upper portion of the left box wall and the upper portion of the right box wall of the treatment box, a water inlet pipe is fixedly connected to the middle of the upper end of the treatment box, a switch valve is arranged on the outer surface of the water inlet pipe, and a water drainage pipe is fixedly connected to the lower portion of the right end of the treatment box. According to the auxiliary filtering device for building water supply and drainage, thr