Rain Bird® DB6R1 6" Black Round Drainage Catch Basin with 1 Outlet is manufactured from High Impact Polystyrene (HIPS) which is used to collect and discharge excess water in order to prevent potential damage to landscapes and property. This basin has 1 universal outlet which can be used with 3" & 4" sewer & drain pipe (ASTM D2729), 3" & 4" corrugated pipe and 3" & 4" triple wall pipe. This basin is designed to accept the 6" round flat, 6" round atrium and 7" square universal grates and includes a sump, which allows sediment to settle in basin to minimize clogging of pipes.