Quick Tip: Why Choose 3”x 4” Downspouts Instead of 2” x 3” Downspouts

Downspouts are the part of your gutter system that actually carry the water from your gutter down to the ground. A 2”x 3” downspout has a maximum capacity to carry 6 square inches of water at any given time – 2 x 3 = 6. A 3”x 4” downspout can carry a maximum capacity of 12 square inches of water, doubling the drainage capacity of the downspout. So no matter what size your gutters are, if your downspouts cannot drain them quickly enough during heavy rain, they will overflow. Downspouts are “the rubber to the road” of your gutter system.