Selkirk LLC 3" B VENT OUTLET COUPLER

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-IC: 3" inlet coupler No. AF3-OC: 3" outlet coupler No. AF4-IC: 4" inlet coupler NOTE: Model SW flexible chimney liner is fully compatible with standard Selkirk-Metalbestos Type B gas vent which means it can be used with most Type B vent combinations in completing the installation.\