Aluminum Outlets

A hole is cut out in the bottom of the gutter in the shape of the outlet tube that you are using. The outlet tube is then placed inside the gutter with the expanded flange keeping it from falling through the cut hole. The flange of the outlet is then riveted to the gutter. The downspout slips over the outlet tube to touch the bottom of the gutter and is fastened.

Aluminum outlet tubes should be sealed with 12-1 Ruscoe seam sealant.