: after six years my copper pipes have leaked : with pin holes all along their length. : some of my neighbours have the same problemOk you have holes in the piping. There are several possible causes 1- High acid content in the water? 2- Improper installation due to excessive velocity especially on the hot water piping 3-Wrong type of copper specified K,L.M? 4-Water not properly treated 5-Piping not protected from lime deposits or other harmful backfill 6-Acid type fluxes not properly flushed out 7-piping not reamed causing errosion due to increased velocity 8- Wrong material chosen before water samples were taken This is like me posting MY car wont start and neither does the guy down the block. Considering I have no idea what part of the planet you are talking about it is hard to pin point what the actual problem could be. Respectifully Sylvan