How to Build a Propane Meter

Boom! The classic potato gun harnesses the combustion of flammable vapor. Show us your combustion spud gun and discuss fuels, ratios, safety, ignition systems, tools, and more.
NatoHub
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Fri Apr 11, 2008 5:56 pm

Thanks, I have one of these torch-adapters:
Image

I was wondering if I could dissassemble it and possibly have something I could work with, but so far I can't figure out how to get the bended-tube-part off. :(
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STHORNE
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Fri Apr 11, 2008 6:02 pm

hack saw...
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DYI
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Fri Apr 11, 2008 6:05 pm

Have you ever tried simply twisting it out with pipe wrenches? It screws into 1/4" compression threads, and then you can make a thread adapter with it by using a 1/4" compression to NPT adapter. DON'T HACKSAW IT.
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STHORNE
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Fri Apr 11, 2008 6:08 pm

DYI wrote:DON'T HACKSAW IT.
why not? if you plan on connecting a hose to it and clamp it down (via hose clamp), I don't see what the problem is. But i suppose you could just twist it out and buy a 1/4" hose fitting...

Ooo.... one more post till big 5...0...0!!!!
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Fri Apr 11, 2008 6:17 pm

If it does unscrew, i must need something heavier-duty because i tried to get it off. I'll try again though.

Here's the adapter I have:

Image

And here's the tip without the cover thing, it has a TINY hole in it that releases the propane:

Image

My question is, if all else fails, would drilling that tiny hole larger then adding a hose directly to that pipe, what are the chances of it working?

Thanks[/img]
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STHORNE
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Fri Apr 11, 2008 6:19 pm

chances = can't fail (unless you some how screw up the drilling process).
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DYI
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Fri Apr 11, 2008 6:21 pm

What sizes of pipe wrench were you using? :shock:

I find that 12" ones are enough to loosen it quite easily.
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STHORNE
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Fri Apr 11, 2008 6:23 pm

that, or just put that baby in a vise and PULL!
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JDP12
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Fri Apr 11, 2008 6:32 pm

or go on burntlatke's website and look up how to thread it correctly..... STHORNE, how bout that snow we're sposed to get this weekend too? ridiculous..
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STHORNE
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Fri Apr 11, 2008 6:40 pm

okily dokily! nope we helped ya NatoHub
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JDP12
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Fri Apr 11, 2008 6:42 pm

yep.. here's the burntlatke link http://www.burntlatke.com/thread.html
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NatoHub
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Fri Apr 11, 2008 6:45 pm

Thanks for suggesting BurntLatke's page. I'm not quite sure where I can get a cutting die, but my dad probably knows something about them (because of where he works), he usually knows where to get stuff like this.
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JDP12
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Fri Apr 11, 2008 6:48 pm

I think you can get them off mcmaster as well, also, most good hardware stores have them.
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STHORNE
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Fri Apr 11, 2008 6:48 pm

see, what is the first thing they tell you to do on BurntLatke.... cut off the tip with a Hack Saw!

ha ha! in your face DYI.
(lol, no hard feelings, its all a matter of oppinion how you go upon this).
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Fri Apr 11, 2008 7:11 pm

I accomplished this in under one minute. The pink stuff is some sort of glue that was on the threads, but it didn't stand much of a chance against a 12" pipe wrench. You can tell when the glue is broken when you hear a snap.

Image

Those threads are the same as threads on a 1/4" compression fitting, and will seal as long as you use a sealant compound.
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