Does anyone know how this happens

[Sue66]

Pinhole leak in old thick copper cold pipe for no apparent reason. See middle of picture

 

[Harvest Fields]

Probably just a week/thin point in the copper.

 

[Sue66]

Probably just a week/thin point in the copper.

Ok thanks just seems wierd in such thick copper. I've had this one time before as well.

 

[ShaunCorbs]

could be corrosion cut it open and find out

 

[Burger]

Could it be uncleared flux?

 

[Stu-B]

I had the exact same thing Tuesday evening on open vent fill pipe, I bet it’s been in about 30 years too, very strange

 

[Sue66]

I had the exact same thing Tuesday evening on open vent fill pipe, I bet it’s been in about 30 years too, very strange

I find it extremely strange.

 

[Chuck]

Pinhole leak in old thick copper cold pipe for no apparent reason. See middle of picture

Lots of possible causes (Google it). It often said that copper pipe lasts 20-50 years.

If you are lucky, it'll be one defect in an otherwise good system. More realistically, it'll be the first of several in that run of pipe. If you are unlucky, pinholes will start appearing everywhere over the next few years and you'll need to re-pipe the whole house.

Personally, I'd replace the run at this point and have a critical look at the appearance of any other easily visible pipes. If the surface looks 'dimpled' that section is probably on its last legs.

If you do need to re-pipe, my advice would be to use branded high-quality tube such as Yorkshire, not some no-name stuff from China via ebay. (I suspect that plenty of people these days would repipe in plastic but I'm a dinasaur and I don't like the stuff.)

 

[Sue66]

Could it be uncleared flux?

There was nothing on the outside. I just don't get it.
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Struggling with this quote malarkey but Yes I see what you mean. So basically even really thick copper can just suddenly pin hole everywhere even though its super thick and this is just the first to appear.

 

[Harvest Fields]

What do you mean Quote malarkey?

 

[ShaunCorbs]

Had one a week ish ago was just full of flux

 

[Sue66]

What do you mean Quote malarkey?

Sorry I was trying to quote what people are saying and it was problematic.

 

[Harvest Fields]

Sorry I was trying to quote what people are saying and it was problematic.

Ohhh. That make absolute sense now.
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Had one a week ish ago was just full of flux

Had 3 in the last 2 weeks. Had not had any in ages before that.

 

[Sue66]

Maybe plastic from now on then. First time I'm actually thinking this!

 

[firemant]

I don;t know w'y it happened.

but about 10 years ago, I had done a conventional to combi swap. Tidying up and getting paid. waked in the kitchen and water was squirting up through the kitchen floor. It was a quite magnificent fountain display, what you would see in a municipal pond / fountain. Had to replace about 9M of hot water pipe.