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These adapters convert a rectangular or square downspout outlet to a round drainage pipe or drainage tile. They come in four size combinations: 2x3x3, 2x3x4, 3x4x3 and 3x4x4, so a 2x3 or 3x4 downspout can feed a 3-inch or 4-inch round line. The black finish suits dark gutters and hides dirt better than white. They are a simple plumbing fitting rather than a gadget: no moving parts, and the job is done once the size matches. Rivals are similar plastic adapters; the choice comes down to getting the right square-to-round combination.
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Lowest price we've seen: $3.98 on Nov 12 at The Home Depot. Tracked across 12 stores since Nov 12.
The Black Downspout Adapter connects a rectangular or square downspout to any style of round drainage pipe or drainage tile. It changes the opening from square to round.
