Copper is a metal which does not corrode in the conventional sense of the word, rather copper leaches in to the water. Copper is a very dangerous metal in drinking water plumbing as it elevates copper levels in the drinking water to above the United States E.P.A. mandated levels (1.3 ppm) or of the W.H.O. mandated levels (2.0 ppm). This leaching occurs when water is in contact with copper piping for any period of time. With the use of SeaQuest, this leaching is controlled to a bare minimum level bringing the maximum copper levels at the tap to below mandated levels.