The DMfit Strainers are used for the protection of your pumps, filters, and other more expensive equipment. These strainers prevent damage by keeping debris and other particles out of your pumps and filters, which eliminates unnecessary and costly repairs. They also allow you to easily reduce your filter consumption. The filter screen uses perforated mesh media to strain out these particles. With the filter screen removed, the strainer can also be used as an injection port for sanitizing.