https://www.supplyhouse.com/Supply-Stops-Risers-636000

 

Are you sure it is copper and not a 3/8 brass threaded nipple?

 

Don’t shop at home depot. Go to a real plumbing supply.

 

use compression angle stop valve available at HD or Lowes. Tubing is measured OD pipe is ID. 5/8 is mistakenly called 1/2 pipe..Use compression angle stop valve and you will not need to solder. Do not hold te nut and turn body as this will cut ferrule and the valve will leak. It is sealed where the body meets ferrule.

 

What exactly are you dealing with here? Please describe the existing "toilet pipe" better.

Is it copper? Does it have a common-looking angle stop valve on it, and if so how is this valve attached (compression, solder, threaded, etc)?

Just for clarification, "nominal" usually means inside dimension. If you truly do have 5/8" nominal copper, that would be the same as 3/4" OD, which is a very rare size, but it does exist. That size of copper is usually only used for refrigeration piping.

Did your house used to be owned by an HVAC guy?

Can you post a picture of what you're dealing with?

 

1/2" sharkbite or fittings should fit 1/2" copper pipe. Maybe some old solder stuck still? Sometimes plumber might crimp the fitting on pipe so it's bent? !/2" copper measures about 5/8 outside, so you seem to have half inch pipe. Solder drips down so check under the pipe also with a mirror. Even possible you bent it while cutting. Make sure both inside and outside edges have no burrs.

 

1/2 pipe is .84 od not .625

 

Not sure if you are intentionally trying to muddy the waters or not, but when you say "1/2 pipe is .84" are you referring to the same type of "toilet pipe" that the OP might be dealing with, or some different type of pipe?

If we are talking about copper pipe (like I believe many of us assume we might be dealing with), 1/2" definately does NOT equal .84". You'd have to skip ahead 2 sizes to 3/4" nominal size to get .84 OD like you're talking about.

So far all we have to go off of is what Sims1983 said in his first post, where he says "I was gonna solder. I measured the pipe and nominal its 5/8in".

Now if we assume he knows what he's talking about and take him for his word, then I would interpret that as meaning 5/8" nominal (3/4" OD) copper.

Of course that is such an oddball size for plumbing use that I don't really believe that's what we're dealing with, so your guess is really as good as mine. (I like a&b home's guess of 1/2" brass. That could get us to the .84" OD figure that you through out).

Hey Sims1983, you got your ears on? Did you figure out what you're dealing with yet?

 

5/8 copper is mistakenly called 1/2 pipe. A 5/8 compression angle stop valve will fit on the copper no soldering needed.
Tube is measured by an exact outside diameter (OD) and wall thickness.
Pipe is measured by a nominal outside diameter (also known as NPS or Nominal Pipe Size) and wall thickness.
Pipe has schedules for wall thickness-- 25 ,40, 80 all have the same OD.

 

5/8 copper is mistakenly called 1/2 pipe. A 5/8 compression angle stop valve will fit on the copper no soldering needed.
Tube is measured by an exact outside diameter (OD) and wall thickness.
Pipe is measured by a nominal inside diameter (also known as NPS or Nominal Pipe Size) and wall thickness.
Pipe has schedules for wall thickness-- 25 ,40, 80 all have the same OD.

 

It's not always a mistake. If you were to get a chunk of 5/8" Type-L copper "tubing" and try to join it to a piece of 1/2" Type-L copper "pipe" with a 1/2" solder-type coupling, it would work just fine. 1/2" and 5/8" copper in this situation is exactly the same size.

Just like 5/8" hard copper "pipe" would be exactly the same as 3/4" soft copper "tubing".

Unless we were using the copper for refrigeration "piping", then it would be referred to by it's outside dimension no matter if it were hard or soft copper, or if we were using soldered fittings or flare. But then we could take that exact same piece of "ACR" refrigeration copper and call it "Type L" (which it technically is) and then it would go back to being all confusing for everyone again.

Hello sims1983. Where'd you go? Come back and let us know how it's going!