The Watts GRD-610-W is an epoxy-coated cast iron green-roof overflow drain featuring a flashing clamp, an integral 4-inch (102 mm) high internal standpipe, a self-locking aluminum dome, and a perforated stainless steel ballast guard with a secured solid cover. It uses a standard no-hub outlet.

Key Features

• Designed for overflow drainage in extensive green roof systems

• Epoxy-coated cast iron body for corrosion resistance

• Integral 4-inch high internal standpipe for overflow control

• Self-locking aluminum dome and perforated stainless steel guard for debris and ballast protection

• Removable cover provides surface maintenance access