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Black NDS 4-inch atrium drain grate, three-quarter view showing raised dome design and open grate pattern for debris protection.

NDS 78 4" Atrium Drain Grate — Fits 4" Pipes, Black HDPE

Brand: NDS
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$27.56
$20.67
SKU 78
In Stock (94)

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The NDS 78 4" Atrium Drain Grate is a durable, raised-dome grate engineered for landscape drainage where leaves, mulch, and debris may otherwise clog surface drains. Constructed from UV-stabilized HDPE (structural foam polyolefin), the 78 connects directly to 4" sewer and drain pipe, single-wall corrugated pipe, and 4" triple-wall pipe for a soil-tight fit.

  • Material: HDPE structural foam polyolefin treated with UV inhibitors for long-lasting outdoor durability.
  • Compatibility: Designed to fit 4" sewer & drain pipe and fittings, 4" corrugated pipe, and 4" triple-wall pipe.
  • Design & Performance: Raised atrium dome blocks debris while allowing free flow; open surface area 17.0 sq. in. with a flow rate up to 52 GPM.
  • Dimensions: Grate height approximately 4-7/16"; top diameter ~2-3/4"; grate openings about 1/4".
  • Benefits: Chemical-resistant, rustproof, maintenance-free, lightweight, and easy to install and remove for access and cleaning.
  • Applications: Ideal for mulched landscape beds, planter areas, window wells, and natural areas prone to debris collection.

For professional projects, the NDS 78 offers a straightforward, reliable way to protect sub-surface drainage systems from clogging while maintaining strong flow capacity. Technical literature and spec sheets are available from the manufacturer for engineers and installers who need detailed performance data.

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Frequently Asked Questions

What pipes and fittings does this grate fit?
The NDS 78 fits 4" sewer and drain pipe & fittings, 4" single-wall corrugated pipe, and 4" triple-wall pipe for a soil-tight connection.
How durable is the NDS 78 grate outdoors?
Made from UV-stabilized HDPE polyolefin, it resists fading, cracking, and common chemicals for long outdoor service life.
Is the grate removable for maintenance or cleaning?
Yes— the atrium grate is removable to provide easy access to the pipe for cleaning and routine maintenance.
What performance can I expect from the atrium design?
The raised dome blocks leaves and mulch at the base while maintaining a large open surface area (17.0 sq. in.) and up to 52 GPM flow.