NDS 980G Square Catch Basin Drain Grate – Diamond Design, 9-Inch Black, Fits Risers & Low-Profile Adapter

The NDS 980G Square Catch Basin Drain Grate blends practical drainage with a timeless diamond pattern. Engineered to fit 9-inch catch basins, it helps keep debris out of the system while allowing surface water to flow smoothly through the open grid. The result is a clean, low-profile grate that supports a dependable drainage setup in outdoor spaces.

Made from high-density polyethylene (HDPE) and treated with UV inhibitors, this grate is designed to resist fading and cracking in sun-exposed environments. It features a 39.5 square inch open surface area and a flow capability up to 121 GPM when installed correctly. With a Class B load rating (up to 175 psi) under proper installation, it is suitable for medium-duty traffic, autos, and light trucks at speeds under 20 mph, while remaining ADA compliant for accessibility projects.

Key benefits

• Blocks leaves & debris while letting surface water flow through for efficient drainage
• Diamond-design grate adds a structured look and helps with debris capture
• Fits 9-inch catch basins and works with risers or low-profile adapters
• HDPE construction with UV inhibitors resists fading and cracking in outdoor use
• Open area of 39.5 sq in supports up to 121 GPM for typical stormwater scenarios
• ADA compliant and rated for Class B loads (up to 175 psi) with proper installation
• Available in a variety of colors to suit outdoor aesthetics

What you can use it for

• Draining heavy flows from lawns, landscaped areas, patios, walkways, and under downspouts into a capture device
• Connecting to a downstream discharge point such as a pop-up emitter for reliable surface drainage

Materials & durability

The grate is crafted from HDPE and treated with UV inhibitors to help prevent fading and cracking over time, even with regular sun exposure. Its durable design makes it suitable for outdoor installations across seasons.

Installation tips

• Place the grate on top of a capture device such as the 9 in. catch basin, riser, or low-profile adapter
• Ensure alignment for maximum debris blocking and optimal water flow
• Consult local codes and follow recommended installation practices for best results

Whether upgrading an existing system or planning a new setup, the NDS 980G offers reliable drainage performance with a clean, enduring finish. Benefits are presented as possibilities depending on site conditions and installation quality.