Any suggestions for connecting slightly oversized old copper pipes with 12 copper unions or sharkbite fittings?
Asked by Esther Soler 
5 months ago
Last Updated: July 26, 2024
Has anyone encountered those old copper pipes that seem like they’re 1/2 inch, but in reality, they’re slightly larger so regular 1/2 inch copper unions and sharkbite fittings won’t fit over them?
If the flexible copper tube has been frozen before, it might be causing the issue. You can try working your way back to find a non-swollen spot or use a file and abrasive sandcloth to reduce its size.
Absolutely, Brien. Copper tubes will swell up if they have been frozen before.
You may need to take out the insert in the sharkbite to make it fit
It should do the job just fine. The only drawback is that the sharkbite might start leaking sooner than usual.
Curious about the difference in thickness between old copper and new copper?
In copper pipes, there are two different thicknesses to consider. The inner core ring, meant for support, can be removed if you are working with thick-walled copper. As a side note, I have used shark bites in two houses without experiencing any leaks.
It’s most likely brass pipe
The first thing to do is get rid of the sharkbites. If you’re using soft copper, you’ll need the right compression fittings and a flaring tool. It may take some practice, but it’s not too hard. If you’re switching to a different material, you’ll need the right adapters and tools for that material.
Hey there! Have you experienced your pipe freezing and expanding? Consider getting a tubing re-sizer.
Hey, have you checked with a plumber yet?
It’s known as swelling. It happened to me when I redid my main bathroom last year. At some stage, there was either too much pressure or a freeze. Try dropping an inch and recutting. Keep doing this until your new joint fits.
Did it freeze and expand? Can you cut further down or to the next fitting without any big problems?
You might just need to use the trusty old pipe stretcher.