The Square Catch Basin is ideal for handling heavy flows from lawns, landscaped areas, under downspouts, patios, and walkways. The catch basin, or catch drain, does more than “catch” water-as part of a complete drainage system, it works stealthily underground to direct water to connected drain pipes which carry the water to a discharge point such as a pop-up emitter, or to percolate into the ground with a dry well or infiltration trench.