Question on copper tube OD vs ID , parts etc

[miserkris]

For connecting a bigger outlet compared to a vampire tap now for rodi....I am trying to add a copper" Tee" to a cold water copper tube in my basement.

When I measured the diameter it's exactly 7/8"....used a calipers to measure.(pic 1,2)

What size Tee should I get? I guess ID should be little less than 7/8"?

Reason for my confusion is...
I bought the wrong sizes today and realised the 1/2" PEX is actually 5/8"OD.(pic 3)
so unsure what size to buy for copper tube that's exactly 7/8"OD.

pls advice thx

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[thegrun]

I would get a fitting that has an internal diameter of 7/8" (sorry, couldn't resist!!!). That is 3/4" copper pipe, use a 3/4" fitting.

 

[miserkris]

I would get a fitting that has an internal diameter of 7/8" (sorry, couldn't resist!!!). That is 3/4" copper pipe, use a 3/4" fitting.

Thanks that was my guess initially...

So how much should I cut the pipe and remove a piece for inserting the 3/4" Tee?

I'm guessing till half inch can be pushed into both sides into the copper push connect Tee?

Is it easy to cut pipe using this(what the HD guy gave):

Thanks...never cut copper pipe before!
[emoji3] [emoji106]

 

[jeepj667]

That will cut the pipe pretty easy just go slow. Snug it down, spin a couple times, snug again, spin again, etc. If you try to tighten too much at once it will dent the pipe and not work.

 

[miserkris]

That will cut the pipe pretty easy just go slow. Snug it down, spin a couple times, snug again, spin again, etc. If you try to tighten too much at once it will dent the pipe and not work.

Worked THANKS

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[ca1ore]

BTW if you have never cut copper before you also have to sweat the copper fittings - which is not a trivial skill.

 

[mcgyvr]

BTW if you have never cut copper before you also have to sweat the copper fittings - which is not a trivial skill.

sweat = solder for you layman..

Or just stick it in a corner.. Get all up in its face and go drill Sargent on it... Thats how to make copper sweat..

 

[billdogg]

BTW if you have never cut copper before you also have to sweat the copper fittings - which is not a trivial skill.

I would STRONGLY suggest that you buy a few extra fittings and a length of tubing to practice with. It is not hard once you learn how, but it is nowhere near as forgiving as PVC. If done wrong it WILL leak - either as soon as you turn the water back on or sometime down the road, usually right after you've left for a 2 week vacation. It won't be a small flood if it does. A neighbor filled his basement because he thought he knew what he was doing.

sweat = solder for you layman..

Or just stick it in a corner.. Get all up in its face and go drill Sargent on it... Thats how to make copper sweat..

Or go this route:hmm4:

 

[mcgyvr]

And in the future...
Google "copper tube dimensions" and voila...

 

[ca1ore]

Missed the comment about 'push connect T' - something like a sharkbite T? Never used one myself, but avoids the need for soldering.

 

[billdogg]

Missed the comment about 'push connect T' - something like a sharkbite T? Never used one myself, but avoids the need for soldering.

Well that's just cheating...........


I have used them a couple times in the past in places where I wasn't comfortable using a propane torch, but I'm still not convinced as to their long term viability. They also cost about 15x more than a standard fitting.

 

[AnnaCassandra]

And in the future...
Google "copper tube dimensions" and voila...

Do this google nominal pipe diameters for whatever pipe material you are working with, pipe sizes are rather non-intuitive. As you see below a *5/8"* nominal pipe size actually has an OD of 3/4", fittings are often named for nominal pipe size they are meant to work with not their ID or OD
For Copper pipes:
Nominal
Pipe Size
(inches) O.D. I.D.
1/4 0.375 0.305
3/8 0.500 0.402
1/2 0.625 0.527
5/8 0.750 0.652

 

[mcgyvr]

Well that's just cheating...........


I have used them a couple times in the past in places where I wasn't comfortable using a propane torch, but I'm still not convinced as to their long term viability. They also cost about 15x more than a standard fitting.

Of course if you don't do copper plumbing you would need a torch head/propane tank/flux/solder,etc... so the cost difference is minimal..

FYI.. I've used a sharkbite on all PEX 10+ years ago and its been 100% fine.. No leaks at all.. They are reliable..

But yes.... cheater