Zurn’s combination roof drain and overflow is constructed of a Dura-Coated cast-iron body. The roof drain features a cast iron clamp device with an integral gravel guard, roof sump receiver, and cast-iron dome strainer, and includes a 4-inch no hub outlet, allowing for easy instillation. Backed with a 1-year warranty, building owners can rest easy knowing the durable construction will stand the test of time against extended wear and tear. The 2-in-1 roof drain and overflow saves time and money and fulfills mandatory code requirements.