The Direct Vent Chimney line includes a complete variety of pipe and fittings, 4x6 and 5x8 diameters, including installation kits for every application. It features heavy gauge 430 stainless steel flue to fight corrosion and provide strength to high-heat direct vent gas appliance installations. Unitized construction eliminates field assembly of inner flue and casing, and SureLock™ twist connections on 4x6 components make connections quick and fastener-free. It can be used in both horizontal and vertical configurations. Field-applied sealant is not required. Outer casings are available with galvanized or black-painted finish.