NDS 1882 - 18" Tapered Square Catch Basin with 2 OpeningsSpecification Sheet Flow Capacities NDS 1882 18" Tapered Square Catch Basin, 2 Openings A simple solution to protect property against water damage caused by excess rainwater or irrigation. NDS square catch basins are a durable solution that provides excellent performance in the collection of surface water while minimizing the amount of debris entering a drainage system. DS offers a complete line of catch basins and grates for residential and