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Old 11-16-2006, 04:48 AM   #11
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Originally Posted by Reverend JC
Sorry chairman, when i looked at the thread at work i had forgoten that infact it was you that posted it.


So, what is the harm in sanding down the tube and then just soldering it?
That seems like the easiest way to go without havnig to buy a 25 dollar drill bit.
No harm I can see if you back it up with some solder...Chairman???
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Old 11-16-2006, 05:14 AM   #12
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Quote:
Originally Posted by Yuri_Rage
No harm I can see if you back it up with some solder...Chairman???

I can't see a problem with it, the goal is to make something that works, right? Those drills aren't any more expensive than the normal sizes up here. Didn't even think they'd be harder to come by.
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Old 11-16-2006, 01:57 PM   #13
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I'm having trouble understanding the problem here. The drill bit is to hollow out the interior of the compression fitting so that the soft copper tubing can pass completely through. If the 3/8" bit is just a bit too small, you can probably just run it through applying a little lateral pressure in all directions. Brass is pretty soft. You might also try wrapping some sandpaper around a bic pen and running it through a few times.

Don't sand the copper because the compression ferrule is depending on that specific diameter (and a smooth surface).

If you end up soldering, you may have saved yourself some money by simply using copper tees and a drilled out endcap.

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Old 11-16-2006, 02:07 PM   #14
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Quote:
Originally Posted by Bobby_M
If you end up soldering, you may have saved yourself some money by simply using copper tees and a drilled out endcap.

That's a really good point, sweat fittings are way cheaper than compression fittings.
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Old 11-16-2006, 02:17 PM   #15
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Which is why I plan to give the all-copper solution a shot before dropping the cash on brass. Of course, the tolerance of the drilled out endcap needs to be very close. It's tough to bridge gaps with solder.

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Old 11-16-2006, 02:45 PM   #16
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Quote:
Originally Posted by Bobby_M
If the 3/8" bit is just a bit too small, you can probably just run it through applying a little lateral pressure in all directions. Brass is pretty soft.
Ever try to get a perfectly round hole with this technique? I'm guessing that you'd do more harm trying to walk the bit around than you would with some sandpaper. Just my $.02.
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Old 11-16-2006, 04:09 PM   #17
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Yuri,

There's no need to get a perfect hole. You're just hollowing out the interior of the compression fitting enough so the tubing fits. The actual seal is still made with an untouched ferrule.

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Old 11-16-2006, 04:13 PM   #18
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Quote:
Originally Posted by Bobby_M
Yuri,

There's no need to get a perfect hole. You're just hollowing out the interior of the compression fitting enough so the tubing fits. The actual seal is still made with an untouched ferrule.
Silly me...alright...I'll shut up already...
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Old 11-16-2006, 04:16 PM   #19
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well, i wonder if the home depot sells a compression fitting that is a 1/2 to 25/64?

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Old 11-16-2006, 04:18 PM   #20
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I'm pretty sure my local Home Depot's inventories are governed by a random number generator. When I need something specific like that, never seems to be available.

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