The Watts GRD-690 is a shallow planter drain designed specifically for green-roof systems where subsurface drainage is required. Its epoxy-coated cast iron body provides excellent corrosion resistance, and it includes a flashing clamp, self-locking ductile iron dome, perforated stainless-steel gravel guard with secured solid cover and lift handle, and a standard no-hub outlet.
Key Features
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Intended for subsurface drainage in shallow planter and green roof applications
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Epoxy-coated cast iron body for durability and corrosion resistance
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Perforated stainless-steel ballast guard to prevent debris intrusion
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Removable solid cover with lift handle for maintenance access
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Available with no-hub or optional push-on connection types
