NDS 900GRKIT 9" Black Square Catch Basin Drain Kit with Green Plastic Grate. Kit includes a 2-opening catch basin drain, 1 square drain grate (also known as a drain cover), 2 locking outlet adapters, and 1 outlet plug. Catch basin connects to 3 in. & 4 in. sewer and drain, single-wall corrugated, triple-wall, and DWV/Sch. 40 pipes using the included locking outlet adapters. Polypropylene (PP) basin and high-density polyethylene (HDPE) grate are treated with UV inhibitors. Built-in sump is easy to access and clean. Hassle-free limited lifetime warranty guarantees the NDS product is free from defects—or we’ll replace it.