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How To Make A Pneumatic Modified Sprinkler Valve Potato Gun

How To Build:

Step 1 - Cut the PVC pipes with a hack saw to the appropriate lengths according to the diagram below. Make sure the pipes are cleaned.

Step 2 - Wrap some teflon tape on the thick end of the shrader valve about 4 or 5 times around. Drill a small hole equal to the circumference of the thick end of the shrader valve on the 4" PVC pipe (Air Tank) where shown. Use a wrench to screw the schrader valve into the small hole.

Step 3 - Attach a Modified Sprinkler Valve.(Learn How To Build One Here)

Step 4 - Apply PVC primer then PVC cement to the ends of the pipes where shown while cementing all the pipes together. Wait 24 Hours for the cement to dry before shooting.

How To Use:

Shove a potato with a ramrod or a stick down to the end of the barrel. Hook up a bike pump or an air compressor to the the shrader valve. Pump up the air tank to about 60-100 psi. Push the blowvalve button to fire the gun.

Combustion Potato Gun Diagram

Materials Needed:

1) 1" Modified Sprinkler Valve (Learn How To Build One Here)

2) 2" X 2" PVC SCH40 Pipe x3

3) 1" PVC Nipple (Threaded) x2

4) 2" To 1" PVC Reducer Coupling x2

5) 2" X 4' PVC SCH40 Pipe (Barrel)

6) 2" PVC Elbow x2

7) 4'' To 2" PVC Reducer Coupling

8) 4" X 1.5' PVC SCH40 Pipe (Air Tank)

9) Schrader Valve

10) 4" PVC Cap

11) Teflon Tape

Tools Needed:

12) PVC Primer And Cement

13) Hack Saw

14) Wrench