1970's cooper tube sizes

[rpprice49]

I have a piece of plumbing pipe with an apparent 11/16 OD and 10/16 ID meaning inside diameter. Where do I get the odd size to get pipe or fittings to fix leaks?

[azflycaster]

Most of the copper tubing would have been 1/2 inch OD. When water freezes inside the tubing it will expand and stretch and/or split the line.

Instead of patching, you might consider replacing all of the lines with PEX.

[tphan]

I agree with AZfly- replace all your cooper tube with PEX.

[damonbeals]

copper hot water and cold water pipes are different sizes. 1/2" hot is a different size then 1/2" cold.

Also if the pipe has frozen it can swell and not be a standard size anymore.

Damon

[WineStream]

Yup. Your pipes have frozen at some time and expanded. I'm surprised at the sizes you mention though that they have not burst before getting to that size.

Trace the copper to a point where it's the correct size and then cut it. Replace the cut-out section with PEX and shark-bite connectors (there's other ways to connect, but shark bites are best IMHO).