Nds 11 4 Inch Black Round Drain Grate

Product Description

The NDS 11 is a 4-inch round drain grate made from structural foam polyolefin with UV inhibitors built into the material. It is designed for surface drainage applications where a secure, weather-resistant cover is needed over a drain inlet. The open surface area measures 3.85 square inches, providing a flow capacity of 5.04 gallons per minute (GPM). Licensed plumbers and drainage contractors install this grate as part of residential or commercial site drainage systems. Its load rating supports pedestrian, bicycle, and wheelchair traffic, making it appropriate for walkways, patios, and accessible routes.

This grate fits 4-inch sewer drain pipe fittings, 3-inch corrugated pipe, and 4-inch triple wall pipe. It is suited for outdoor drainage installations where surface runoff must be directed into an underground drainage system. Common applications include landscape drainage, hardscape drainage, driveway borders, and ADA-accessible walkway areas. The black finish blends with standard hardscape materials and resists fading through UV-inhibitor treatment in the polyolefin substrate.

Key Features

• 4-inch round profile fits standard 4-inch sewer drain fittings, 3-inch corrugated pipe, and 4-inch triple wall pipe
• Structural foam polyolefin construction with UV inhibitors for outdoor durability
• 3.85 square inch open surface area with a 5.04 GPM flow rate
• Rated for pedestrian, bicycle, and wheelchair traffic loads
• Black finish resists UV fading in exposed installations

Compatibility

Fits 4-inch sewer drain pipe fittings, 3-inch corrugated pipe, and 4-inch triple wall pipe as stated by the manufacturer.

Installation Notes

Installation is typically performed by a licensed plumber or drainage contractor as part of a subsurface drainage system. Power or water supply to the drainage system area should be confirmed clear before trenching or fitting work begins. Ensure the drain body is fully seated and secured before placing the grate to prevent shifting under traffic loads. Follow local plumbing codes and applicable IPC guidelines for drain placement and cover load requirements.

Technical Specifications

• Nominal Size: 4 inches
• Shape: Round
• Color: Black
• Material: Structural Foam Polyolefin with UV Inhibitors
• Open Surface Area: 3.85 square inches
• Flow Rate: 5.04 GPM
• Traffic Rating: Pedestrian, Bicycle, Wheelchair
• Weight: 4 pounds
• Unit of Measure: EA
• Package Quantity: 25

Standard Information

• Brand: NDS
• Manufacturer Part Number: 11