Inlet And Outlet Couplers
For venting gas appliances such as furnaces, water heaters, gas fireplace inserts, and stoves. Double wall. For joining multiple lengths of the Model SW flexible liner. The inlet coupler is made of aluminum. The outlet coupler is made of galvanized steel.No. AF3-BVA: 3" inlet coupler No. AF3-OC: 3" outlet coupler No. AF4-BVA: 4" inlet coupler |