The 4" Black Flat Top Atrium Grate is made from durable structural foam polyolefin with UV inhibitors for long-lasting performance. It has a 17 sq. in. open surface and a 52.01 GPM flow rate. It fits 4" sewer and drain pipes, 4" corrugated pipes, and 4" triple-wall pipes. It is designed for efficient water flow and debris management.

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