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My cannon broke and pipe is stuck inside 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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Unread postAuthor: pyrogeek » Tue Jul 17, 2007 2:25 pm

replace all the fittings. They can't be that expensive, and you are just asking for trouble using DWV otherwise.
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Unread postAuthor: spudbud101 » Tue Jul 17, 2007 2:28 pm

Meh, I'll retire this cannon. I'm building another one anyway with a solenoid valve. Plus I ordered a block from noname.
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Unread postAuthor: MrCrowley » Tue Jul 17, 2007 3:00 pm

spudbud101 wrote:Meh. Whatever. Its fine, I just want to fix it.


No its not, I just had some 260psi rated PVC explode next to me and two friends, no one was hurt but that was just pure luck it missed us all.
I've passed the solvent welding course so I know what im doing there and the gun has never been banged or dropped to weaken the fittings so I take it was just a fault in the fitting, though they aren't meant for air pressure.
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Unread postAuthor: spudbud101 » Tue Jul 17, 2007 3:38 pm

I've passed the course, too. I thought DWV fittings were okay to use.
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Unread postAuthor: MrCrowley » Tue Jul 17, 2007 3:41 pm

Not in a pneumatic, where did you get that from?
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Unread postAuthor: spudbud101 » Tue Jul 17, 2007 4:03 pm

Some site that I can't find on Google. He said even though the fitting said DWV it should hold pressure because the PVC pipe said DWV. (All the PVC pipe I get says DWV but it is pressure rated).
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Unread postAuthor: anatov » Tue Jul 17, 2007 4:27 pm

What's the solvent welding course?
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Unread postAuthor: MrCrowley » Tue Jul 17, 2007 11:26 pm

It was stickied, next time use the search tool to find information instead of posting.

http://www.spudfiles.com/forums/solvent ... t3009.html
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Unread postAuthor: frankrede » Wed Jul 18, 2007 1:15 am

spudbud101 wrote:Some site that I can't find on Google. He said even though the fitting said DWV it should hold pressure because the PVC pipe said DWV. (All the PVC pipe I get says DWV but it is pressure rated).
No, your pipe can have DWV on it, but it still must have a pressure rating too.
Fittings though must have nsf-pw on it, and have deep sockets.
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