NDS 7 in. Square Drain Grate, Gray Plastic (Model 773)

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Durable NDS 7 in. Square Drain Grate (model 773) protects lawns, patios, walkways and landscaped areas by keeping leaves and debris out of drain pipe while allowing efficient water flow. Lightweight and easy to install, this grate delivers maintenance-free performance for residential and light commercial drainage systems. Compatibility: Fits 6 in. round Spee-D® catch basin, 6 in. sewer & drain pipe and fittings, and 6 in. single- or dual-wall corrugated pipe. Material: Made from UV-stabilized high-density polyethylene (HDPE) for chemical resistance, rustproof performance, and long-term durability. Dimensions: Top measures approximately 6-7/8 in. square with a grate height of 2-3/8 in.; grate openings are 1/4 in. Hydraulic Capacity: Open surface area ~13.6 sq. in. with a flow capacity of about 42 GPM, suitable for moderate lawn and roof runoff. Design Benefits: Increased open surface area improves flow versus a round grate; removable design allows fast access for cleaning and inspection. Installation: Lightweight plastic construction snaps into compatible collars or basin tops for a secure, soil-tight fit without special tools. Backed by NDS drainage expertise, the 773 square grate is an economical, corrosion-resistant option for routine surface drainage. Refer to NDS technical literature for installation drawings, CAD files, and flow tables when specifying for projects. Show more