Step 1: PVC Parts You Will Need:
(All Schedule 40 Rated PVC)
x1 2" Diameter by 2' Length PVC Pipe
x1 1" Diameter by 2' Length PVC Pipe
x1 2" PVC End Cap (Rounded)
x2 1" Threaded PVC Connector
x2 2" PVC Schedule 40 PVC Coupling (Long)
x2 2" to 1" PVC Reducer Bushing
x4 2" PVC DWV Coupling (Short)
Step 2: Other Parts You Will Need:
Items you will need:
x1 1/4" to 1/4" Male Male Brass Nipple
x1 1/4" Air Blow Gun Trigger
x1 Tire Valves (Found at Auto Parts Stores)
Tools you will need:
5/8" Hole Drill bit
7/16" or 15/32" Hole Drill bit (1/2" is too big)
Phillips Head Screw Driver bit
Epoxy (Gorilla brand epoxy is best)
PVC Primer and PVC Glue
A Saw of some kind (skill saw recommended)
Step 3: Start Cutting the 2" PVC!
This is where you can choose. One piece is your barrel and the other is your air chamber. You can cut it evenly if you wish, or have a short chamber and a long barrel. We have found a shorter barrel and a longer chamber works the best.
Step 4: Start Cutting the 1" PVC!
Step 5: Drill a Hole in the End Cap
Step 6: Drill the Rainbird
Note: If you want a safety so that you can run with the launcher on your back or something, put a 1/4" ball valve into the lid rather than the brass nipple. The last picture shows a comparison between the standard set up (on the right) and the assembly with the safety (on the left, the red lever is the ball valve).
Step 7: PRIME EVERYTHING!!!!!
Step 8: Epoxy Time!!
Also put a generous amount on the outside for added support and protection. Do not skimp on the epoxy. If you don't put enough epoxy around the valve, it will leak, and you will have to start over.
Step 9: Epoxy the Rainbird!
Put epoxy all along the rim of the brass on the inside and out for extra leakage coverage. Again, if you do not put enough epoxy around the brass, it will leak and you will have to start over.
Step 10: Glue the PVC!!!!!
Connect the 2" to 1" reducer to the schedule 40 (long) 2" coupling.
Connect the 1" PVC small section to the 1" threaded coupling.
Connect the above pieces together.
Repeat 1 more time with the other identical parts.
Connect the 2" PVC pipe sections to the schedule 40 (long) couplings.
Glue the tire valve end cap to the end of your chamber.
Step 11: Put Your Rainbird Back Together
There are many different triggers you can use. The one on the left has a 1/4" Ball valve for a safety, the one on the right does not have a safety.
Step 13: Screw in the Chamber and the Barrel
Make sure you screw the chamber and barrel into the correct sides of the Rainbird. The chamber goes on the back end and the barrel goes on the front end. There are arrows on the Rainbird that show the direction of the airflow.
Once all the glue is cured (let sit over night), pump it up with a bike pump or air compressor.
We have found that 80 PSI works the best, any more pressure and the projectiles launched start going wild.
Ammo that can be used:
Nerf Mini Vortex Pocket Footballs
2.25" Stress Balls
Once you have assembled it and let it cure, pump up the chamber to about 40 PSI and place the launcher in a bathtub full of water to check for leaks. If you see any bubbles, you missed a seal and need to start over.
Once you have checked your seals, just paint it what ever color scheme you want and you are ready to go!