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Front-angle view of NDS D6 6-inch Duracast™ ductile iron round drain grate showing slot pattern, top diameter and protective black finish.

NDS D6 6in Round Duracast™ Ductile Iron Drain Grate

Brand: NDS
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$107.47
$80.60
SKU NDSD6

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Durable NDS D6 6-inch round Duracast™ ductile iron grate designed to protect 6-inch drainage lines and Spee-D® catch basins. Built for long-term outdoor use, the D6 combines high load capacity with a debris-blocking profile to keep surface water flowing and piping clear.

  • Material & finish: Duracast™ ductile iron with a protective black finish applied for shipping and storage.
  • Fits: Connects directly to 6" Spee-D® catch basins, 6" sewer and drain pipes, and single-wall corrugated pipe for a soil-tight fit.
  • Load rating: H-20 rated—suitable for light vehicular and pedestrian traffic in driveways, plazas, and parking areas.
  • Dimensions: Top diameter approx. 8-1/16", height 2-7/8", grate openings 5/8" (approximate nominal dimensions).
  • Performance: Open surface area ~7.0 sq. in.; flow rate ~22 GPM to handle typical runoff from landscaped and paved surfaces.
  • Maintenance: Removable grate for easy cleaning; ductile iron will develop a protective patina over time and requires minimal upkeep.

Ideal for driveways, patios, landscaped areas, and light-duty parking zones, the NDS D6 provides a dependable, long-lasting solution for surface drainage. Refer to the manufacturer's technical literature and installation details for submittal drawings, mounting adapters, and local code considerations.

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Frequently Asked Questions

Will this grate fit a 6-inch Spee-D catch basin?
Yes. The D6 is made to connect to 6" Spee-D® catch basins, 6" sewer/drain pipe, and single-wall corrugated pipe.
What is the load rating for the D6 grate?
Duracast™ ductile iron construction carries an H-20 load rating, suitable for light vehicular and pedestrian traffic.
Will the ductile iron grate rust or require coating?
Ductile iron will develop a protective patina over time; NDS ships grates with a light black finish to slow surface oxidation.
How do I maintain or clean this drain grate?
Lift the removable grate to remove leaves and sediment; rinse and inspect the catch basin sump periodically for buildup.

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