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cdru
Go Colts
MVM
join:2003-05-14
Fort Wayne, IN

2 recommendations

cdru to brandon

MVM

to brandon

Re: Pinhole in a copper pipe

There are a variety of different handyman methods of patching the leak. The rubber hose method that UHF mentioned is probably the quickest, but it's also the least permanent method that you should even consider. There are compression union fittings that you can purchase at a hardware store that you can use to replace a section of pipe. You cut the line where the hole is, slip the connector on all the way one way, slide it down over the other section of pipe, and then tighten up the joints. More permanent then the rubber hose, but not the best. Replacing the section is the best fix but also requires the most work and if you've never soldered, probably not the best thing to practice on.

All these things though treat the effect, not the cause. Pinhole leaks don't just happen without a reason after years of service. Usually the two likely culprets is electrolysis or acidic water. With electrolysis, an electrical charge slowly transfers copper ions from the pipe to other metals, usually a galvanized pipe of sorts. It's the same process that is used with metal plating. Over time, enough of those ions are transfered that the wall thins and a small pin hole leak forms. If one pin hole leak has formed, it's likely that more may show up soon. The other cause, acidic water, is essentially the same process.

Fix your pipe, but you'd also do go to have your water tested. There are systems available that can negate both of the common conditions described above.

John Galt6
Forward, March
Premium Member
join:2004-09-30
Happy Camp

John Galt6

Premium Member

said by cdru:

With electrolysis, an electrical charge slowly transfers copper ions from the pipe to other metals, usually a galvanized pipe of sorts.
You should check the ground for your electrical system, from the panel to the rod. It may be corroded and/or disconnected. Be careful when fooling with the electrical ground wire. Just inspect it. If it looks like it needs work, call Sparky.