Re: Copper Pipe Leaks
Posted by Wash Post on July 04, 19100 at 16:28:01:
In response to Re: Copper Pipe Leaks
: I have encountered 5 leaks in the Type M copper tube in my home. All of the leaks have occurred in the cold water piping. This piping is 3/4" in diameter. I am on a municipal water system which uses surface water.

: The piping manufacture looked at the pipe and suggested that the water is the problem. He stated that it appears to be cold water pitting, but admits that this is usually seen in areas using well water. He also stated that the piping looks brand new inside and says that 11 yr old pipe should have a protective layer of corrosion inside. The only evidence of a problem from the outside is a very small pinhole leak. Inside is sort of a blister of corrosion. The last piece remove had two leaks and 4 blisters.

: Does anyone have any idea what could be causing this. Additionally, what material should be used when it is replaced. I've considered PEX, CPVC and Type L Copper tube. I should also note that the plumbers I've spoken with seem to believe that this has become a common problem in this area.

: Thanks

See the posting called And the Leak goes on From the Washington Post July 1. The replacement copper tube is a harder pipe when it is labled Type L Copper tube. The copper itself is an excellent transmitter of pure potable water. Water is an excellent transmitter of electricity as well as is copper an excellent transmitter. Take the section of copper to a metallurgy lab to determine if the leak starts from the inside or the outside. They can do an electron microscope analysis and examine the pits. When they are larger inside than outside the forensic indicators are that there is an outside trauma, such as a banging or expansion contraction that causes the weakness in the pipe wall. Is the pipe made in america HAPPY 4 th OF JULY YOU PLUMBERS WORKING TODAY or is the pipe Korea made? Pipe manufactured in the USA has an electronic electrostatic waveform generated through the run that can be discarded when it shows erratic cycles. Most government installations exclude pipe manufactured outside of the USA for quality control reasons. Residential installations get builders to sometimes try to cave money on the materilas or labor.


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