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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® 5BVLX6 Low Profile Double Wall Increaser, 5 x 6 in