Drill bit size for copper pipe union?

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Well, yes and no.... the OD of copper pipe is the same regardless of whether it's type M, L, or whatever -- but 3/4" copper pipe is a considerably diffferent size from 3/4" steel pipe is a different size from from 3/4" PVC pipe is a considerably different size from 3/4" CPVC pipe is pretty near the same size as 3/4" copper... Confused yet? :-)
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I first wrote:

"Doug Miller" responded:

Extraneous bullshit intended to confuse the issue.
Lew
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On Fri, 25 Jun 2010 21:27:10 -0700, Lew Hodgett wrote:

I like fish, but if you're making kettles by soldering pipe together, shouldn't you specify a lead-free solder?
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IS CORRECT, _IN_THE_ORIGINAL_CONTEXT_ -- "fittings", not "Pipe"

IS CORRECT, _IN_THE_ORIGINAL_CONTEXT_ -- "fittings", not "Pipe"

Yes, _Pipe_ is specified by OD. ID varies.
*FITTINGS* -- the 'stuff' under discussion -- which pipe goes into, *ARE* sized by the I.D. They -have- to be, to ensure a proper fit with the 'same size name' pipe (OD. speirfication) The OD of such fittings is *NOT* critical -- it doesn't have to match up to anything else -- and, therefore *CAN*BE* 'whatever the manufacturer d*mn well pleases"
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snipped-for-privacy@host122.r-bonomi.com (Robert Bonomi) wrote:

Incorrect IN ALL CONTEXTS because the statement is overly general. "Plumbing stuff" includes both pipe and fittings. Had you said "Plumbing fittings are specced by inside diameter" I would not have disagreed.
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<...snipped...>

That may be true in the case of couplings or fittings that pipe screws _into_ but the OD of the pipe itself is controlled by the spec, otherwise pipe and fittings from different sources would not be interchangeable. And unlike pipe, tubing is sized by OD.
--
When the game is over, the pawn and the king are returned to the same box.

Larry Wasserman - Baltimore Maryland - lwasserm(a)sdf. lonestar.org
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The drill has to match the exterior dimension of the union? That dimension is NOT CONTROLLED, it can be different from one to the next. One I have handy measures 18.6 mm, a little under 47/64 inch...
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On 6/25/2010 6:59 PM, J. Clarke wrote:

Well, for anyone who cares, I found that the right size bit is an Irwin Model 44801 <evil grin>.
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J. Clarke wrote:

If you epoxy it in, use the 23/32 or 3/4". If you are press fitting it, use the 11/16. If the press is too tight, perhaps freezing the coupling to shrink it a bit first would help.
Out of curiosity, what are you using it for? I use them for file and chisel handles I turn, they look really nice all shined up and varnished, even after 30 years of hard use:
http://jbstein.com/Flick/Handle.jpg
http://jbstein.com/Flick/Handle2.jpg
Also, I measured an old 1/2 fitting with my new 6" HF digital caliper and also got 23/32. The caliber is on sale 7/2 to 7/5 at HF fo $15. I of course paid list on an impulse buy.
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Jack
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