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Front view of NDS 6" black Atrium Grate, raised-dome HDPE cover with 1/4" openings and 3.88" top diameter for Spee-D basin fit.

NDS 90 — 6" Round Atrium Grate, HDPE Raised Dome (Black)

Brand: NDS
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$31.40
$23.55
SKU 90
In Stock (46)

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The NDS 90 — 6" Atrium Grate is a raised-dome drainage cover engineered for mulched landscape beds, window wells, and debris-prone planting areas. Molded from UV-stabilized HDPE, the grate is lightweight, rustproof, chemical-resistant, and designed to limit clogging while maintaining consistent water flow.

  • Material: UV-treated high-density polyethylene (HDPE) for long outdoor life.
  • Compatibility: Fits Spee-D® Catch Basin, 6" sewer & drain pipe and fittings, and 6" single-wall corrugated pipe.
  • Dimensions: top diameter 3-7/8" (3.88"), overall height 5-3/4" (5.75"), grate openings 1/4".
  • Hydraulics: open surface area ~28.4 sq in; flow capacity ~87 GPM for moderate stormwater flows.
  • Benefits: lightweight (~0.62 lb), maintenance-free, chemical- and UV-resistant; raised dome blocks mulch and leaves while allowing continuous drainage.
  • Color/Options: Standard black finish; NDS offers alternate materials and finishes for other applications.

Use the NDS 6" Atrium Grate to protect downstream pipes and minimize maintenance in landscaped or natural areas. Refer to the manufacturer's tech spec and drainage catalog for installation guidance, performance tables, and part submittals.

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Frequently Asked Questions

What pipes and basins does this grate fit?
Fits Spee-D® Catch Basin, 6" sewer & drain pipe and fittings, and 6" single-wall corrugated pipe; designed for a soil-tight fit.
What material is the grate made from and is it durable?
Made from UV-treated HDPE. It is chemical-resistant, rustproof, lightweight, and treated to resist sun-related fading and cracking.
What are the grate dimensions and flow capacity?
Top diameter 3.88", overall height 5.75", open area ~28.4 sq in with an approximate flow of 87 GPM for moderate flows.
How do I maintain or clean the Atrium Grate?
Occasional removal and rinsing removes trapped debris; inspect for buildup after heavy storms and clear mulch or leaves as needed.

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