Step 1: Parts and materials
For this project I used 4" PVC for the chamber and 2" PVC for the barrel. These pipe sizes can be changed based on availability.
Other important pieces are the :
4" cleanout with cap (Top right).
4" to 2" reducing coupling (Top Left).
4" x 4" x 2" coupling w/ sweep 90' (Middle)
2" cap (middle right)
PVC cleaner and cement
Not pictured : a BBQ grill igniter (pushbutton type)
Step 2: Chamber assembly
The cleanout and cap will fit right into the 4x4x2 coupling.The 2" sweep should curve away from the cleanout when it is installed. glue these pieces together and you have created the handle and gas chamber. The cleanout will be where we fill the gun with hair spray. (picture 3)
Next step is to add a 2" piece about 5" long to the sweep. Picture 4 is an example of how not to cut PVC (Ha ha ha) Picture 5 shows the 2" piece being inserted into the sweep.
Picture 7 shows installing the 2" piece into the sweep and putting the 2" cap on the end. This 2" cap will serve as the trigger assembly.
Picture 8 & 9 illustrate cutting a 12" piece of 4" pipe and inserting it into the coupling. The chamber is almost complete.x