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Top and angled view of NDS 1290 black atrium grate made from UV-protected HDPE, showing domed slotted pattern and overall square shape.

NDS 1290 12" Square Atrium Grate - Black HDPE, 11.75 x 11.75 x 6 in

Brand: NDS
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$110.05
$82.53
SKU 1290
In Stock (54)

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The NDS 1290 12" Square Atrium Grate is a durable, UV-protected HDPE grate designed to keep leaves, mulch, and debris out of 12" catch basins while allowing efficient water flow. Its domed atrium pattern rises above surrounding surfaces to intercept surface debris and direct runoff into the drainage system. Built for landscape and light-traffic applications, the grate is rustproof, chemical-resistant, and low-maintenance.

  • Fits: Designed for NDS 12" x 12" catch basins, risers, and low-profile adapters.
  • Material: UV-stabilized high-density polyethylene (HDPE) for outdoor durability and fade resistance.
  • Dimensions: 11.75" length × 11.75" width × 6" height; lightweight for easy handling.
  • Hydraulic capacity: 154.79 GPM and 3/8" grate openings for reliable flow while blocking large debris.
  • Performance: Domed atrium pattern prevents clogging from mulch and leaves; maintenance-free and chemically resistant.

Use the NDS 1290 Atrium Grate in planter beds, mulch areas, window wells, patios, and other landscape locations where debris and heavy surface flows are a concern. The grate pairs with the NDS 12" catch basin series and simple adapters for quick installation. Because it is made from UV-protected HDPE, the grate resists sun damage and remains stable over time, offering a long-lasting alternative to concrete drain covers. Check product spec sheets and installation guides for load-class guidance when used in vehicular areas.

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