does it say how much copper was found? I'd be interested to know if a couple of fittings would introduce enough copper to cause issue?Maybe this is why:
"For example, trace amounts of copper found in drinking water fed to rabbit models developed for highly refined applications throughout Alzheimer¹s research study* induced the affects of Alzheimer disease...
*"Trace amounts of copper in water induce B-amyloid plaques and learning deficits in a rabbit model of Alzheimer¹s disease", D. Larry Sparks and Bernard G. Schreurs, PNAS September 16, 2003, vol. 100, no. 19, pgs 11065-11069."