4-inch flat round grates are ideal for planter beds, mulch areas, window wells, and areas prone to debris collection. This grate helps to collect and remove excess water from driveways, patios, yards, and any other outdoor areas. ADA-compliant, designed for maximum strength and durability, attaches directly to Sewer and Drain Pipe and Fittings, Triple Wall Pipe attach directly to Sewer and Drain Pipe and Fittings, Triple Wall Pipe and Corrugated Pipe. Easy to use, StormDrain Water Management Systems grates feature UV inhibitors that prevent fading and cracking from the sun. These chemical-resistant and rustproof grates are maintenance-free, lightweight, and easy to install. For use where a catch basin is not appropriate or feasible. Attach directly to the drainage pipe.