The Watts GRD-670 is a green-roof planter drain designed for primary drainage in large planter beds and vegetated roof sections. Its epoxy-coated cast iron body provides strong corrosion resistance, while the perforated stainless-steel ballast guard helps prevent soil and debris from obstructing flow. A secured solid cover allows for surface-level maintenance access, and the unit includes a standard no-hub outlet for straightforward installation.

Key Features

• Designed for primary drainage in green-roof planter systems

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

• Perforated stainless-steel ballast guard to block debris

• Secured solid cover for maintenance access

• Supplied with a standard no-hub outlet