A standard H-20 rated plaza drain inlet assembly features a PVC drain basin embedded below grade with a top grate opening of 16.25 inches by 16.25 inches and a drain area of 92.5 square inches. A hinged cast iron grate cover conforming to ASTM A48 Class 30B with black paint finish provides easy access. Watertight adaptors connect to the side of the basin for plastic piping systems. Invert depths are specified on plan.
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