The Watts RD-100 is a large-area roof drain engineered for primary drainage on roofs. It features an epoxy-coated cast iron body, a flashing clamp with an integral gravel stop, a UV-stabilized self-locking polyethylene dome (standard), and a no-hub outlet (standard).

Key Features

• Designed for primary roof drainage with a heavy-duty cast iron body

• Flashing clamp plus integral gravel stop for proper installation and protection

• Self-locking dome designed for debris resistance and long-term durability

• Standard no-hub outlet, with multiple outlet and dome options available

• Accepts a variety of pipe sizes (2″–6″) and offers optional accessories such as sump receivers, ballast guards, or extension flanges