Our non-positional lock system on the DuraVent® BV gas vent is the best lock system on the market today. The incorporation of the DuraTab® feature simply improves our lock system by adding flexibility and meeting market needs. The BV line of DuraVent® round vent pipe and fittings is designed for use on approved gas appliances in residential and light commercial and industrial applications.

DuraVent® Type B Round Gas Vent Pipe, 4 in Nominal, DuraLock/DuraTab Connection, Aluminum/Steel, Galvanized, 0.012 in, 0.018 in Wall Thickness, 60 in Length, Additional Information: Rigid Construction

• Rugged construction - strong, durable galvanized steel outer pipe has internal spacing beads to assure a uniform insulating air space between pipe walls, each end is die formed to assure uniform sizing for strong, easy to connect joints
• Assured safety - the double wall (pipe within a pipe) construction with its built-in air space, provides permanent insulation and keeps the inner pipe hot and the outer pipe relatively cool, this construction creates quick, strong vent action reducing condensation in the pipe and overheating of nearby enclosure surfaces