There is many options: many require the water shut off and the water drained from the copper pipe.
A mechanized patch clamp that is positioned on top of the leaky area. Head to a hardware or plumbing supply. This needs to be looked at as a temporary fix.
A variety of materials, many epoxy based, could be applied to the leaky area after the water is off and the pipe is drained, and the outside pipe surface is cleaned well to removed dirt, filth, and oxidation. These are also available in the plumbing section of a hardware store
Patch the pipe with a coupler. If you need to fix a drip quickly and adequately but you don"t have any additional pipe on hand – just a coupler and solder, that"ll do just fine. Cut the pipe on top of the pinhole leak so the pipe splits in two. Sand 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 solution.
With just one pinhole, there"s 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 figure out the level of the corrosion and how much ought to be replaced.Tags: repair