4-inch PVC fitting adapter. 4-inch PVC coupling pipe. 4-inch x 24-inch PVC pipe. This is the combustion chamber. 4-inch to 2-inch PVC reducer. 2-inch x 48-inch PVC pipe. This is the barrel.

Replacement BBQ Igniter Plastic Bottle Soup Can and Lid Screws 3/4" to 2" PVC Reducer 2" PVC Coupling 4 Feet of Wire Hot Glue Electrical Tape Clear Packaging Tape 90%+ Isopropyl Alcohol Spray ...

Inside the PVC, glue a small piece of scrap wood under ... Step 6: Form a horn on the end of the tube by gluing on a reducing coupling. Cut a circular piece of chicken wire and use Krazy glue ...