Moe, Thanks for your reply. Are you aware of a way to pinpoint where electrolysis is occurring in the pipe? The water first out of the tap had lower concentrations of copper in it than what was collected after purging 1.3L out of the pipe. To me this suggests that electrolysis occurs further down the pipe. Thanks.
H2: there is no way that I am aware of to discern the exact location of an active “site” of corrosion in progress within a piping system. I think your 1.3L assumption is based on good deductive reasoning. MOE