990-AST 9IN GRATE SQUARE GREEN

PART 184440

SUPPLIER NDS

SUPPLIER PART # 990-AST

RANK C

SHELF PACK 8

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About this item

The NDS 990-AST 9-inch Square Drain Grate is a high-performance surface drainage solution designed to protect your property from water damage while maintaining a clean, professional look. Built to fit 6-inch sewer and drain pipes, fittings, and Spee-D® Catch Basins, this green polyethylene grate is engineered to handle moderate stormwater flows while keeping debris out of your drainage system.

Whether you're managing runoff from lawns, landscaped areas, patios, or downspouts, this grate offers a reliable, clog-resistant, and ADA-compliant solution that integrates seamlessly into your outdoor environment.

Key Features & Benefits

💧 Efficient Water Flow

With an open surface area of 28.4 square inches and a flow rate of up to 87 gallons per minute (GPM), the 990-AST grate efficiently channels stormwater into your drainage system—reducing pooling, erosion, and water damage.

🛡️ Debris-Blocking Design

The grate’s slotted surface prevents leaves, mulch, and other debris from entering and clogging your pipes, ensuring long-term system performance and reducing maintenance needs.

🌿 Low-Profile, Landscape-Friendly Appearance

Finished in natural green, the grate blends into turf, mulch beds, and garden areas, maintaining the aesthetics of your landscape while providing essential drainage functionality.

🧱 Durable, UV-Resistant Construction

Made from high-density polyethylene (HDPE) with UV inhibitors, the grate resists fading, cracking, and corrosion—even in harsh outdoor conditions. It’s built to last through years of sun, rain, and temperature fluctuations.

♿ ADA Compliant

The 990-AST meets ADA (Americans with Disabilities Act) standards, making it safe for use in public and residential walkways, patios, and other pedestrian-accessible areas.

🔧 Easy Installation & Compatibility

Designed to fit securely on 6-inch sewer and drain pipe, triple-wall pipe, and Spee-D® Catch Basins, this grate installs quickly and easily without special tools. It’s part of a modular system that allows for flexible drainage design.

Technical Specifications

Model Number: 990-AST
Manufacturer: NDS, Inc.
Grate Size: 9 in. x 9 in.
Open Surface Area: 28.4 sq. in.
Flow Rate: 87 GPM
Material: High-Density Polyethylene (HDPE)
Color: Green
Compatibility: Fits 6 in. sewer & drain pipe, triple-wall pipe, and Spee-D® Catch Basins
Compliance: ADA Compliant
UV Resistant: Yes
Installation: Snap-in or screw-in (depending on basin type)
Warranty: Limited Manufacturer Warranty

Applications

The NDS 990-AST is ideal for:

🏡 Residential Lawns & Gardens – Prevent water pooling and protect landscaping.
🏢 Commercial Landscapes – Maintain clean, safe walkways and green spaces.
🌧️ Stormwater Management – Direct runoff from downspouts, patios, and driveways.
🛠️ Drainage Systems – Integrates with catch basins and pipe systems for complete water control.

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Brand NDS

UPC Code 052063909905

Shelf Pack 8

Country Of Origin United States

Minimum Order Qty 1

Supplier Name NDS

Supplier Short Name NDS

Supplier Address 1 21820 Burbank Blvd Suite 200

Supplier City Woodland Hills

Supplier State CA

Supplier Zip 91367

Country US

Supplier Email mallen@hardwaresalesco.com

Supplier Url www.ndspro.com

Buyer Name Michael Heck

Supplier Phone (800) 726-1994

Supplier Fax (800) 726-1998

Our Customer Id 2099

Return Policy Return to Wallace

Product Lines Plumbing Accesories

Rep Name Mike Allen

Rep Address @ Factory Cindy Fernandez Cindyfernandez@ndspro.com

Rep Phone (901) 647-9286

Rep Email mallen@hardwaresalesco.com

Rep Agency Hardware Sales Co