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® Storm Collar, 12 in, Aluminum, Finish: Galvanized, 13 in ID x 16-1/2 in OD x 1-3/4 in H, Additional Information: For Use With Model BV Type B Gas Vent System, DuraLock® Locking Device

• Used above the flashing to provide weather strip seal to pipe
• Seal the inner edge with sealant against pipe