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
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Designed for primary drainage in green-roof planter systems
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Epoxy-coated cast iron body for long-term durability
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Perforated stainless-steel ballast guard to block debris
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Secured solid cover for maintenance access
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Supplied with a standard no-hub outlet
