A small number of failures in stainless steel press fittings occurring within 2 years from installation seem to be the primary problem with the Danish stainless steel installations. The water quality is not considered aggressive towards stainless steel, and the chloride content is often low, but still crevice corrosion develops in the connection between pipe and fitting causing rust stains and small leaks at the outside of the connection. The Fe2+ ions from the crevice are mixed with the oxygen containing water in the pipes forming Fe2O3 on the inside of the pipe surface and at the crevice Often the failure is more of a visual problem than severe leakage, but it may still be unacceptable for the consumer for several reasons, including the metal release of iron, nickel, and chromium. The failures discovered are typically in larger public buildings.