The Aluminum Classic Drain is manufactured from spun aluminum. Its one-piece construction is designed for quick installation in new connection and ponded roof applications. The drain can be connected by using the mechanical coupler provided. The drain flange has six welded aluminum studs to secure the aluminum clamping ring and six pre-drilled fastener holes for attachment of the drain to the roof deck. The drain flange has a depressed sump area to facilitate the drainage of all water from the roof surface. The cast aluminum strainer dome is secured to the cast aluminum clamping ring by means of 3 stainless steel screws.