Prevent unwanted debris from clogging your drainage system as you drain away light flows of stormwater from small mulched landscape beds, natural areas, and window wells. The 3 in. Atrium Drain Grate has a domed design that rises above the surface of the ground to block leaves, mulch, and other debris near the base of the drain grate while allowing stormwater to flow through the top. The 3 in. atrium dome drain grate has an open surface area of 9.4 sq. in. and a flow rate of 29 GPM. Connect to 3 in. sewer and drain pipe & fittings, 3 in. single-wall corrugated pipe, and 3 in. triple-wall pipe for a soil-tight fit. Built to stand up to the elements, the atrium drain grate is made of polyethylene, a type of plastic, using a combination of virgin and recycled content treated with UV inhibitors to prevent fading and cracking from the sun. As part of a complete drainage system, the drain grate (also known as a drain cover) drains water entering drain pipes. The pipes 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. Start now and find the right drainage grate for your project with the free NDS Home Drainage Center tool at ndspro.com/home-drainage. NDS, founded in 1972, 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. Color: Green/Matte.