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Seal Around Cleanout Cap

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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Seal Around Cleanout Cap

Unread postAuthor: Mishkan » Thu Jul 09, 2009 8:55 pm

So I'm using cleanout caps on my coaxial (3inch outter) for ease of changing out parts. It has a slight leak at 50ish PSI and then it starts whistling practically around 80.

Anyhow, what have you all used for sealing your cleanout caps decently?

(It works great otherwise)
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Unread postAuthor: cannon monkey » Thu Jul 09, 2009 9:54 pm

teflon tape? ....... around the threads should work :D if thats where leak is
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Unread postAuthor: Mishkan » Thu Jul 09, 2009 10:23 pm

It still seems to be blasting through, I'll give it all another wrap.
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Unread postAuthor: glass_05 » Thu Jul 09, 2009 10:27 pm

yes, plumbers tape should do the trick. make sure you wrap it on with the threads and its tight on there
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Unread postAuthor: Technician1002 » Fri Jul 10, 2009 12:10 am

Most cleanout caps are not pressure rated and tend to change shape under pressure. If you can find the deeper socket schedule 40 pressure rated female adapter and schedule 40 pipe plug, they will do much better.

This 3 inch polypropylene pipe plug is rated to 125 PSI
Image
http://www.murrayequipment.com/iteminfo ... LY&Part=P3
This site has 3 inch female pressure rated threaded adapters.
http://www.koicarp.net/pvc_plumbing/pvc.html Part # PVC-316
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http://www.spudfiles.com/forums/saftey-question-t18614,start,15.html
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Unread postAuthor: Mishkan » Fri Jul 10, 2009 4:02 am

Ok, I'll try reapplying the tape first. If that doesn't work, I might just look at rebuilding it out of metal or using those bigger fittings.
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Unread postAuthor: inonickname » Fri Jul 10, 2009 5:48 am

What color are you using? Use at least 6 wraps of tape.

Cleanout caps aren't really designed for pressure.
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