Dura-Vent Type B Gas Vent Diameter Increaser - 3GVX4

Getting different vent pipe diameters to work together in one installation can be difficult in any individual venting installation. It can be intimidating when you're dealing with Category I natural gas- or propane-fueled appliances, but it doesn't have to be. This Dura-Vent Type B Gas Vent pipe diameter increaser expands a pipe's diameter to make transitioning between two pipe diameters easy.

The adaptor is 4 inches tall and features an aluminum inner liner and a galvanized metal outer wall that matches other Dura-Vent Type B pipes and components. The limited lifetime warranty is another desirable feature, making this Dura-Vent Type B Gas Vent Pipe Increaser a useful and reliable tool to help meet many homeowner's venting needs.

• Increases vent diameter
• For use with Dura-Vent Type B Gas Vent pipes
• 4" tall
• 25-year warranty
• Available in three sizes