This is a a great begginer project for someone who wants to build a pneumatic potato gun. pricing is reasonable, being around $50- $60. took me only an hour to build. The only thing that i would change is the handle, it shold be bigger to hold more air. I havnt found the range yet because I am not sure how much pressure it will take. I dont want pieces of pvc stuck in myself!

read final page for legal.

ps. sorry about photos, my camera is broken so I have to use a phone.

Step 1: Parts

WARNING: MAKE SURE ALL PARTS ARE PVC PRESSURE FITTINGS

-3 of 25mm 90degree elbow
-25MM TEE
-25MM PIPE
-15mm pipe
-2 of 25MM vavle socket
-25mm h/style/w/o valve solenoid
-20 by15mm reducing co
-tape (optional, added for strength)
-clear tube ( will jam into trigger without leaks
-air trigger
-schrader valve (car tyre valve)
- a bit of brass (u will need to thread this and drill through the middle) see pictures.
-pvc glue

Step 2: Construction

MEASURE! then cut
Glue the parts together, prime if u think necessary
making sure everything is straight becuase pvc glue dries extremely fast!
Dont forget to put in the schrader valve as well.
Now tape up the tubes, i used a roll of electrical tape.

Step 3: A Closer Look

The sprinkler valve was taken apart
-a hole was drilled in the top, on an angle
-the hole was threaded

The piece of brass was cut down
- a hole was drilled through the middle
- one end was tappered using a file
- the other end was threaded using a TAP AND DIE SET
- the brass was then screwed into the valve with plumbers tape to stop leaks.

Step 4: Wait

You may be excited to see if ur toy works. but please wait the full 24 hours for the glue to set.

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. i think u understand the waiting part

Now u can test out ur toy. slowly pressurize. Im not too sure how much these pipes will hold. I have only tried mine upto 50psi but I am sure it would go further. dont over-do it though. pvc shatters and sends bits flying everywhere.

fire what u like, potato, marshmallows, or um... stell balls. just remember though, this is now considered a weapon and is illegal to own or use. I will not be held responsible for any damage, injury or death. if u make this project, it is your own responsibility.

so what will u do now, why not modify it? change the barrel, chamber, trigger, change it to fire water balloons... the list goes on. see what u can come up with.