The Watts RD-800 is a super-large-area primary roof drain designed for heavy-duty commercial and industrial roof systems that require maximum drainage capacity. Its epoxy-coated cast iron body provides long-term durability and corrosion resistance, while the flashing clamp and integral gravel stop ensure a secure, watertight connection to the roofing membrane. A large self-locking polyethylene dome protects the drain from debris, and the unit is supplied with a standard no-hub outlet for straightforward installation.

Key Features

• Epoxy-coated cast iron body for long-lasting durability

• Flashing clamp with integral gravel stop for secure membrane integration

• Large self-locking polyethylene dome for effective debris protection

• Standard no-hub outlet for easy connection

• Ideal for super-large-area primary roof drainage applications