The NDS 981 9" Square Atrium Grate is a durable, domed drainage grate designed to protect 9" catch basin openings in landscaped and natural areas. Its raised atrium profile keeps mulch, leaves, and debris out of drain pipes while allowing surface water to flow efficiently to your drainage system. Compatibility: Fits 9" x 9" NDS catch basin series, risers, and low‑profile adapters for straightforward replacement or upgrade. Material: UV‑stabilized structural foam polyolefin (HDPE) for chemical resistance, weather durability, and long service life. Design: Domed atrium top traps large debris while maintaining open surface area for drainage — ideal for mulched beds, natural areas, and window wells. Performance: Open surface area of 31.50 sq in with an approximate flow capacity of 41.27 GPM when used with the 9" catch basin configuration. Maintenance: Lightweight, easy to lift for quick debris removal; no special tools required. Finish: Black color resists fading and blends with landscape settings for a clean appearance. Use the NDS 981 Atrium Grate to protect drains from clogging and to route excess surface water safely to a curb, gutter, or downstream inlet. Refer to the NDS catch basin specifications for load ratings and exact installation instructions to ensure compatibility with your project.
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