Erosion corrosion is a growing problem for copper pipe providing domestic water service.  While multiple causes exist, copper pipe erosion is primarily related to higher than normal water velocity which then produces cavitation immediately downstream of elbows, tees,valves, and other fixtures.  Even the smallest interruption to laminar flow, such as the failure to bevel or camfer the pipe ID can lead to cavitation – an issue we have raised for various forms of pressed copper pipe assembly.

Its impact is amplified by heat, which is why a higher level of deterioration is commonly found at the hot water lines, and those closest to the boiler.  Soft water, and especially RO water, also play a significant role since they remove key elements which actually protect the copper.  The demand for more control over water flow, and the introduction of higher pressures and flow control devices, has also increased the incidence of erosion problems.  When combined, failures can occur in under 5 years, and resemble a mechanical etching or machining away of the pipe wall.

Brass is also susceptible to erosion under certain conditions.

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