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 Post Posted: Mon Oct 21, 2013 5:26 pm 
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Joined: Mon Oct 21, 2013 5:09 pm
Posts: 1
I just built my first pneumatic cannon. When I try to air it up, the air goes straight through the valve and out the barrel. I used a rainbird CP-100 valve and modified it with a blowgun. What did I do wrong?


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 Post Posted: Thu Oct 31, 2013 12:18 pm 
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Joined: Sun Feb 12, 2012 1:19 am
Posts: 10742
My first guess would be that you have the valve backwards or there is a leak somewhere.
Orbit valves have arrows that indicate flow direction. I think your rainbird valve may also have arrows.
If it is installed in the correct direction then there must be a leak somewhere.
Did you remove the solonoid? If so you need to be sure to plug the hole with epoxy or something otherwise the valve will not close properly.


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