The Stegmeier Frontier and Treadmaster Deck Drain is a removable top drain that features a double-wall base and snap-in top (PVC). When installing this drain, the top caps are staggered past the joints making the joints very rigid. Because the top caps are removable, this drain is easy to clean and the top caps can be replaced if ever damaged. Frontier Deck Drain is used in many residential and commercial swimming pools, patios and other pedestrian areas.