DuraVent Oval Type B Gas Vent Model BV 4" to 5" Increaser h30 Can connect multiple extensions for

Can connect multiple extensions for greater length

When the user turns the fireplace or appliance off

All VISION

Round Clear Glass Globe

DuraVent Oval Type B Gas Vent Model BV 4" to 5" Increaser h30 Can connect multiple extensions forOur 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. What's Included (1) Oval Increaser Features Increases size of