Glue an end cap to one end and a female adapter to the other pipe end with ... Use a saber saw to cut lengthwise notches in a ...

4-inch PVC end cap. 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.

With the PVC pipe upright, tap the end cap on with a dead-blow hammer or mallet. Twist the end cap slightly to evenly distribute the cement, then finish tapping the cap until it is firmly seated.

Center the PVC end cap on the wood plate and attach with wood screws. Center the turntable end cap assembly in the bottom of the bucket and attach it with ¼-inch machine screws, washers and nuts.

Insert both glued ends into either end of the PVC coupler [5]. Ease the O-ring [6] over the 2-inch piece of pipe, then glue one of the 1¼-inch caps [4] to the 2-inch piece.