Collect stormwater down the drain, not the leaves, twigs, and debris that come with it. The drain grate defends your drainage system by blocking out fragments that can congest the pipeline to optimize the performance of your drainage system The drain grate, also known as a drain cover, is the frontline of your storm drain system. Use the 24 in. square outdoor drain grate to collect heavy flows from lawns, landscaped areas, parks, driveways, and courtyards. The 24 in. storm drain grate, as part of a complete drainage solution, works with 24 in. catch basin drains (and extension risers) which connect to drain pipes to carry the water to a discharge point downstream such as a pop-up emitter, or to percolate into the ground with a dry well or infiltration trench. The large catch basin grate is made of polyethylene, a type of plastic, treated with UV inhibitors to prevent cracking or fading in the sun. Strategic openings on the expansive 231.7 sq. in. open surface area allow for 709 GPM flow rate capacity. The drain cover is rated for NDS Class B loads (up to 175 psi) when properly installed. NDS offers scalable and flexible solutions to help manage stormwater for commercial, industrial, and residential applications. Founded in 1972, NDS is the preferred choice of professionals with products, tools, and expert support to help get the job done right. Make your project a success with NDS-the leader in stormwater management. Color: Black/Matte.