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00652 PITTING CORROSION IN DOMESTIC COPPER PLUMBING THE RISE AND FALL OF THE "PITTING WATER" THEORY

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Product Number: 51300-00652-SG
ISBN: 00652 2000 CP
Author: Peter F. Ellis II
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The theory that "pitting water"--nonaggressive water with high alkalinity and conductivity--is the primary cause of pitting of cold water copper domestic piping appeared in the literature in 1971. This theory gained popularity for a period of time. However, the accumulation of further evidence showed that the theory was non-predictive, and its original proponents retracted it in the 1980' s. Nonetheless, "pitting water" is blamed for pitting of copper domestic plumbing with disturbing frequency more than a decade after the original proponents of the theory withdrew it. A critical review of the literature is presented showing how the "pitting water" theory arose and tracing the accumulation of evidence that invalidates this theory. The case is presented that the concept of "pitting water" is not mechanistically significant, and that most, if not, all pitting of domestic copper plumbing attributed to "pitting water," is in fact of anthropogenic (human-caused) origin.
The theory that "pitting water"--nonaggressive water with high alkalinity and conductivity--is the primary cause of pitting of cold water copper domestic piping appeared in the literature in 1971. This theory gained popularity for a period of time. However, the accumulation of further evidence showed that the theory was non-predictive, and its original proponents retracted it in the 1980' s. Nonetheless, "pitting water" is blamed for pitting of copper domestic plumbing with disturbing frequency more than a decade after the original proponents of the theory withdrew it. A critical review of the literature is presented showing how the "pitting water" theory arose and tracing the accumulation of evidence that invalidates this theory. The case is presented that the concept of "pitting water" is not mechanistically significant, and that most, if not, all pitting of domestic copper plumbing attributed to "pitting water," is in fact of anthropogenic (human-caused) origin.
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