The Watts GRD-620 is a green-roof plaza area drain designed for vegetated and paved roof walkways and patio areas. The top assembly is nickel bronze with a heel-proof grate, the body is epoxy-coated cast iron with an integrated bottom flashing clamp and a stainless-steel screened aluminum dome, and the standard outlet is no-hub. A 4″ IPS standpipe is included and can be extended or cut to size for the installation.
Key Features
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Specified for green-roof walkway and patio drainage applications
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All nickel bronze top assembly with heel-proof grate for surface safety
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Lower dome design increases drainage capacity above the roof membrane
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4″ IPS standpipe included, adjustable by extension or cutting to fit installation depth
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Epoxy-coated cast-iron body with flashing clamp and stainless-steel screened dome
