NDS Square Catch Basin Drain Grate, 9 in., Green Plastic Drain water away, keep the leaves and debris out. The drain grate, also known as a drain cover, blocks drain-clogging infiltrators before they can enter your drainage system. The 9 in. Square Catch Basin Drain works with the 9 in. square catch basin, riser, and low-profile adapter and is ideal for draining heavy flows from lawns, landscaped areas, under downspouts, patios, and walkways. The catch basin grate has an open surface area of 39.5 sq. in. and 121 GPM flow capacity. As part of a complete drainage system, the drain grate drains water into the catch basin or low-profile adapter connected to drain pipe. Pipes carry the water away 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 catch basin drain grate is made of polyethylene treated with UV inhibitors to prevent cracking or fading. ADA compliant and rated for NDS Class B loads (up to 175 psi) when properly installed. 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 9 in. square catch basin, riser, or low-profile adapter to drain excess stormwater from lawns, landscaped areas, under downspouts, patios, and walkways Fits 9 in. Catch Basin Drain, 9 in. Riser, and 9 in. Low-Profile Adapter . 121 GPM flow rate. 39.5 sq. in. 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; drain grate fits on catch basins, risers, and low-profile adapters and can be secured with screws. 9 in. Catch Basin Drain Grates are available in a variety of colors, materials, and styles Made to fit on 9 in. catch basins, risers, and low-profile adapters Comes with one 9 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.