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Small leak in fitting

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Small leak in fitting

Unread postAuthor: gwoloshyn » Sun Jan 20, 2008 1:35 pm

My air cannon is already finished and glued (properly) but there is a small leak between the air chamber and the coupler that connects it to the sprinkler valve. The coupler and chamber is 3". Is this not safe to be operating? I stay under 100psi. Is there a way to fix this leak?
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Unread postAuthor: elitesniper » Sun Jan 20, 2008 1:48 pm

epoxy should solve your problems, maby it formed air bubbles when you cemented, did you put plenty of primer and cement?
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Unread postAuthor: daberno123 » Sun Jan 20, 2008 2:48 pm

If it was really properly glued it wouldn't be leaking. Just put a ring of epoxy around the coupler and no air will leak out
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Unread postAuthor: SpudMonster » Mon Jan 21, 2008 2:27 am

Air leaks give me the willies, as you know you don't have a 100% solid joint. Not only do you have no idea how solid it is, you are clueless as to what pressure it is safe to.

You could pull a vacuum on the chamber and suck a bead of superglue into the leak. Epoxy looks like crap on a chamber, and smacks of sloppy workmanship. Pulling glue cut with primer into the hole works as well.
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Unread postAuthor: jackssmirkingrevenge » Mon Jan 21, 2008 2:52 am

SpudMonster wrote:Epoxy looks like crap on a chamber, and smacks of sloppy workmanship.


oi!

:P :D
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Unread postAuthor: Killjoy » Mon Jan 21, 2008 5:31 am

^^You take epoxy to on art form JSR, but most others don't, so you're an exception.

The vaccum idea is a good one, but just putting a little epoxy around the joint should be fine, and just smooth it out with a wet finger. And if you got isues with safety, just add a few short screws throught he fitting with a little epoxy to seal to be sue the fitting won't blow off.
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