Dura Vent 3" Round Type B Gas Vent Wall Thimble

Dura Vent 3" Round Type B Gas Vent Wall Thimble 3" Round Type B Gas Vent Female Adapter, Dura-Vent gas vent pipe and accessories assemble quickly with twistlock connections. Type B Gas Vents are for venting listed natural gas or liquid propane Category I appliances.