Supplies needed:
18" of 3" pvc pipe
1 1/2" pvc ball valve
3" end cap
3" to 1 1/2" reducer bushing
3/4" tire vale(like the kind on your bike)
pvc cement
saw
drill with a 3/4"bit
First sand all piping until smooth.
Then cut 4" off your 1 1/2" pipe. Next drill a hole in your end cap. Now put away the tools, you wont need them anymore.
Now glue the larger portino of the 1 1/2" pipe into one end of the ball valve. Then glue the 4" piece into the other end of the valve. Set it aside for now.
Put the tire valve into the hole on the end cap and glue it there. Make sure its the right direction. Then glue the end cap onto the 3" pipe. Next, glue the pipe into the reducer bushing.
Now glue the 4" pipe into the reducer bushing. Now your gun is complete. Let the glue dry over-night and it's ready to use!! Remember always be generous with the glue!!