Skip to content
Top view of NDS 641 green 6-inch square plastic grate showing 5-7/8 inch square top, 1/4 inch openings, and flared design for debris control.

NDS 641 6 in. Square Grate with Low-Profile Adapter

Brand: NDS
Save 25%
$49.08
$36.81
SKU 641

Notify me when back in stock

6 in. Square Grate with Low-Profile Adapter (NDS 641) provides a durable, low-profile solution for intercepting excess surface water. The flared grate increases open surface area for improved flow while blocking leaves and debris.

  • Fits 3" and 4" sewer & drain pipes, single-wall corrugated and triple-wall pipe for broad compatibility.
  • Grate top measures 5-7/8 in. square with 1/4 in. openings; top opening is 6-3/16 in. square for efficient capture.
  • Open surface area: 14.4 sq. in.; flow capacity: 44 GPM to handle moderate residential runoff.
  • Materials: HDPE grate and HIPS low-profile adapter treated with UV inhibitors for long-term outdoor durability.
  • Adapter height: 2-1/2 in.; lightweight design and removable grate make inspection and cleaning fast and simple.
  • Color: Green; chemical-resistant, rustproof and maintenance-free for landscape and patio applications.

Ideal for lawns, landscaped areas, patios, walkways, and under downspouts, the NDS 641 installs directly onto standard drain fittings and pipes. Its low profile and removable top let you access the pipeline for routine maintenance while keeping debris out of the system. Use as part of a complete surface-drainage solution to divert water away from foundations and prevent soggy spots.

Reviews

Frequently Asked Questions

What pipe sizes and types does this grate fit?
Fits 3" and 4" sewer and drain pipes, single-wall corrugated and triple-wall pipe; connects to standard S&D fittings.
What materials are the grate and adapter made from?
Grate is high-density polyethylene (HDPE). The low-profile adapter is high-impact polystyrene (HIPS) treated with UV inhibitors for outdoor durability.
Can the NDS 641 handle vehicle or heavy loads?
This model is designed for light foot traffic and residential surface drainage — it is not rated for vehicular loads.
How do I maintain or clean the NDS 641 grate?
The grate is removable for quick debris removal. Lift out the top, clear leaves, and rinse with water as needed; inspect periodically.