NDS 1212 Square Catch Basin Drain Grate, 12 in, Green Meet the drain grate, the guardian of your drainage system. Place on top of a catch basin drain, riser, or low-profile adapter, and it defends drain pipes by blocking potential intruders such as dirt, leaves, and debris as it drains heavy flows of stormwater from lawns, landscaped areas, under downspouts, and away from patios and walkways.Drain grates, also known as drain covers, help keep your drain pipes clog-free and running smoothly. The 12x12 drainage grate, as part of a complete drainage solution, works with 12 in. catch basins, low-profile adapters, and risers that are connected 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 12 in. drain grate is made of polyethylene, a type of plastic, treated with UV inhibitors prevent cracking and fading in the sun. Strategic openings on the 53.1 sq. in. open surface area provide 162 GPM flow rate capacity. The storm drain grate is rated for NDS Class B loads when properly installed and is ADA compliant.NDS offers free tools such as the Home Drainage Center, Calculators, and NDS Stormwater Drainage mobile app to help make your project a success. Founded in 1972, NDS is the preferred choice of professionals and the leader in stormwater management solutions with proven products, tools, and support to help you get the job done right. Features Protect your drainage system by blocking leaves and debris from entering and potentially clogging the pipeline while letting excess surface water flow through. Use with the 12 in. catch basin, riser, or low-profile adapter to drain heavy flows of excess stormwater from lawns, landscaped areas, under downspouts, patios, and walkways Fits 12 in. Catch Basin storm drain, 12 in. Riser, and 12 in Low-Profile Adapter. 162 GPM flow rate. 53.1 sq. in. of open surface area. Rated for NDS Class B loads (up to 175 psi) when properly installed?recommended for medium-duty pneumatic tire traffic, autos, and light trucks at speeds less than 20 mph; ADA Compliant Easy to install; cover fits on catch basins, risers, and low-profile adapters and can be secured with screws. 12 in. Catch Basin Drain Grates are available in a variety of colors, materials, and styles Made to fit 12 in. square catch basins, risers, and low-profile adapters Comes with one 12 in. Square Catch Basin Drain Grate. Hassle-free limited lifetime warranty guarantees the NDS product is free from defects?or we?ll replace it USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.