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Green NDS 991 9-inch square atrium drain grate made from UV-stabilized polyolefin, domed profile showing square perimeter and rectangular openings, angled view

NDS 991 9 in Square Atrium Drain Grate, Green Polyolefin

Brand: NDS
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$76.51
$57.38
SKU NDS991
In Stock (91)

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Keep landscape drains clear and working efficiently with the NDS 991 9 in Square Atrium Drain Grate. Designed for use with 9" square catch basins, risers, and low-profile adapters, this domed grate prevents debris from entering the drain while allowing moderate stormwater flows to pass through.

  • Durable polyolefin/HDPE construction: UV-stabilized polymer resists fading, cracking, and corrosion for long outdoor life.
  • Domed atrium profile: Raised shape helps trap leaves and mulch while maintaining drainage for landscape beds and window wells.
  • Landscape compatibility: Fits 9" x 9" catch basins and low-profile adapters to capture surface water before it reaches the pipe.
  • Lightweight & easy to install: Snap-in fit lets one person set the grate without special tools.
  • Low maintenance: Simple to remove and clear debris; polymer finish won’t rust or require painting.

Ideal for mulched beds, natural growth areas, and other non-vehicular landscape locations, the NDS 991 provides reliable debris protection and flow performance in a compact 9 in square form. For higher flow or traffic-rated applications, consult NDS product specifications to select a grate pattern and material suited to that load rating.

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Frequently Asked Questions

What catch basins does this grate fit?
Fits standard 9 in. square NDS catch basins, compatible with many risers and low-profile adapters listed for 9×9 systems.
Is this grate rated for vehicle traffic?
No. The polyolefin atrium grate is intended for landscape and pedestrian areas, not for regular vehicular loads or driveways.
How do I maintain and clean the grate?
Lift the grate to remove leaves and debris from the sump, rinse if needed. UV-stabilized polymer resists corrosion and needs minimal upkeep.

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