The Roof Drain 15 Dia 3NH with Poly Dome, Und Clamp, and 4" High WD from Sioux Chief Manufacturing is designed for optimal water drainage in roofing applications. This roof drain features a 15-inch diameter and a durable poly dome that prevents debris accumulation. The under clamp ensures secure installation, while the 4-inch high water dam provides additional protection against overflow. Constructed from high-quality materials, this product meets industry standards for drainage systems, making it suitable for both commercial and residential use. Its effective design and robust construction make it essential for maintaining roof integrity and preventing water damage.