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Catch Basins & Drainage Grates

Catch basins collect surface runoff at a low spot and route it into your drain line. Round and square plastic basins (NDS Spee-D and more) with load-rated grates, 6 to 24 in.

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Catch Basins & Grates

Catch Basins & Grates

What Is a Catch Basin, and How to Choose One

A catch basin collects surface runoff at a low spot and routes it into your drain line. The box sits below grade with a grate on top; debris settles in the sump while water exits the side outlet. Match the outlet to your pipe size (commonly 3 or 4 in.) and pick a grate rated for the traffic it will see.

Size the basin to the area it drains. Larger or fast-flowing areas need a bigger box or several basins tied together. Atrium grates shed leaves in planting beds; flat grates suit lawns and walkways.

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