This NDS 4-inch round drainage grate features a durable satin chrome finish paired with a robust PVC collar treated with UV inhibitors to protect against sun damage and cracking. Engineered for light stormwater flows from small lawns, patios, walkways, and landscaped areas, it delivers a flow rate of up to 16.06 GPM with a 5.25 sq. in. open surface area. Designed to prevent debris and leaves from clogging the pipeline, this rust-resistant, heel-proof cover fits 3-inch sewer and drain pipes as well as 4-inch sewer and drain fittings. The removable metal grate includes brass screws for effortless installation and simplified clean-outs

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