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Top view of NDS 1810 18 in. gray square catch basin grate showing slotted openings and polyolefin surface drainage.

NDS 1810 18 in. Square Catch Basin Grate — Gray Polyolefin

Brand: NDS
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$310.55
$232.91
SKU 1810

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The NDS 1810 18 in. Square Catch Basin Grate in gray is a durable, low-profile drainage grate engineered for residential landscapes, patios, driveways, and light commercial applications. Constructed from structural polyolefin (HDPE-grade) with UV inhibitors, this grate resists fading, cracking, and most chemical exposure while blocking leaves and debris to protect downstream piping. Designed to fit the NDS 18 in. catch basin series, it provides reliable surface drainage and long-term performance with minimal maintenance.

  • Actual dimensions: 16-7/8" x 16-7/8" x 1" — fits 18 in. square catch basin openings.
  • Material: Structural polyolefin/HDPE with UV inhibitors for weather resistance and chemical stability.
  • Load & compliance: Class B medium-duty rating when properly installed (suitable for medium-duty pneumatic tire traffic); ADA-compliant for pedestrian use.
  • Performance: Slotted openings (approx. 7/16") provide substantial open surface area for efficient flow and debris screening.
  • Compatibility: Use with NDS 18 in. catch basin series, risers, and low-profile adapters (examples: 1882, 1884, 1800-series products).
  • Benefits: Lightweight, rustproof, maintenance-free and easy to install; ideal for keeping water away from structures and landscaped areas.

Refer to NDS product literature and the included technical documents for detailed specifications, flow tables, and installation instructions. For projects requiring vehicular traffic, follow the manufacturer's installation guidelines (embed in concrete as specified) to achieve posted load ratings. The NDS 1810 grate offers a practical, long-lasting alternative to cast-iron or concrete covers while maintaining reliable drainage performance.

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