The Watts RD-410 is a large-area roof drain designed for commercial and industrial roofs that require reliable, high-capacity primary drainage. Its epoxy-coated cast iron body provides long-term corrosion resistance, while the flashing clamp and integral gravel stop help ensure a 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 durability and corrosion resistance

• Flashing clamp with integral gravel stop for secure membrane integration

• Large self-locking polyethylene dome for dependable debris protection

• Standard no-hub outlet for easy plumbing connection

• Suitable for large-area primary roof drainage applications