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Top view of NDS 1891 green atrium grate installed over an 18" square catch basin, showing domed profile and 1/2" openings for debris control.

NDS 1891 Atrium Grate — 18" x 18" Green HDPE Decorative Catch Basin Grate

Brand: NDS
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$222.37
$166.78
SKU 1891

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Designed for landscape and light-traffic outdoor areas, the NDS 1891 Atrium Grate provides reliable surface drainage for planter beds, mulch areas, window wells, driveways and patios. Molded for strength and low maintenance, this decorative green grate keeps large debris out while allowing rapid water flow to the catch basin below.

  • Durable material: UV-stabilized HDPE / polyolefin construction resists cracking, chemicals and rust.
  • Nominal size: 18" x 18" (designed for NDS 18" catch basin series; actual grate seating ~16‑13/16" x 16‑13/16").
  • Profile & fit: Low-profile dome design with approximately 1" grate ledge height and total assembly height ~6" for standard 1800-series basins.
  • Drainage performance: Generous open surface area (about 89.4 sq in) with 1/2" openings to shed leaves and debris while maintaining flow.
  • Compatibility: Fits NDS 18" catch basin models (examples: 1882, 1884, 1800, 1804, 1816, 1830, 1840) and other 18" square systems.
  • Made in the USA: Manufactured for landscape use and built to withstand sun exposure with UV inhibitors.

Lightweight for easy installation, the 1891 Atrium Grate is a practical alternative to heavy concrete drains for many residential and commercial landscaping applications. Use with the NDS 18" catch basin series and common 18" square drainage bodies; remove and clean as needed. For installation details and load-class guidance, refer to the NDS catch basin installation documents and specification sheet linked on the product page.

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Frequently Asked Questions

What size catch basin does this grate fit?
The NDS 1891 is designed for the 18" square catch basin series; actual grate seating measures about 16‑13/16" square.
How durable is the atrium grate for outdoor use?
Made from UV-stabilized HDPE/polyolefin, the grate resists sun damage, chemicals and cracking for long outdoor service.
Can the grate handle light vehicle traffic?
The 1891 is built for pedestrian and light-traffic landscape applications; check NDS load-class documentation for vehicular use.