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Copper and Brass pipe threads hate me...

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Copper and Brass pipe threads hate me...

Unread postAuthor: G36CKMS » Sun Apr 30, 2006 4:58 pm

I bought some copper pipe today to make valve for my bb machine gun project. I cant seem to screw the pipe into its parts more than half way, i know when you are screwing something in you get more resistance as you go further but this is rediculous. So is there some secret technique for screwing threaded copper and brass pipe fittings together?
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Unread postAuthor: spudshot » Sun Apr 30, 2006 5:04 pm

thats normal, the threads are tapered to give a seal, just put some teflon tape on them, then tighten them as much as you can by hand, and then use a wrench, but dont over tighten them, you might break the fittings
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Unread postAuthor: saladtossser » Sun Apr 30, 2006 5:43 pm

Teflon tape is a good lube
but try wd-40 if it is really stuck without the tape
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Unread postAuthor: G36CKMS » Sun Apr 30, 2006 5:53 pm

thx guys, what happens if co2 goes through these and they arent all the way in? Using te primitive tools i have i still cant get then in all the way. I havent tried using WD-40 but ive tried another lube, it did not work as well as teflon. Ill be happy with this even if this is the case. Infact if you guys wouldent mind helping me out...

This valve is going inside of an airsoft M4 reciver, if you guys can think of any valves what can fit inside and have a trigger let me know! The simpley, the better!
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Unread postAuthor: boilingleadbath » Sun Apr 30, 2006 7:39 pm

You won't be able to thread it compleatly in, no matter how hard you try. It's designed that way.

As to what would happen if you didn't tighten it enough: it'd leak. Most likely noisily.
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Unread postAuthor: beebs111 » Sun Apr 30, 2006 8:17 pm

you could try threading it pretty far with teflon tape, then pump it up with a bike pump, and spray some soap crap on it, and if it has leaks, redo it with more tape. :)
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