There are many options: many need the water shut off and the water drained from the copper pipe.
A mechanized patch clamp that is put over the leaking area. Head to a hardware or plumbing supply. This really should be looked at as a temporary fix.
A variety of materials, many epoxy based, may be applied to the leaking area after the water is off and the pipe is drained, and the outside pipe surface is cleaned well to removed dirt, filth, and corrosion. These are also available in the plumbing section of a hardware store
Patch the pipe with a coupler. If you need to repair a drip quickly and properly but you don"t have any replacement pipe on hand – just a coupler and solder, that will do just fine. Cut the pipe over the pinhole leak so the pipe splits in two. De-burr the edge, and clean the edge. Apply your flux to both ends of the pipe and attach the coupler – then hit it with your torch and apply solder. This repair isn"t as good as replacing the pipe – but it"s the next best thing.
With one pinhole, there are very likely others that will be coming, Copper pipe is easy to replace with some essential soldering skills, but call a plumber if in doubt. I would take out the defective area and inspect the inside carefully to determine the extent of the corrosion and how much should be replaced.Tags: repair