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suggested that such treatment would be both unsuccessful and unfeasible. It was therefore rec-
ommended that the copper tubes be replaced. Careful attention should be given to the usual causes
of Type I pitting. In particular, it should be ensured that all tubes be thoroughly cleaned and freed
of any carbonaceous deposits prior to installation. The tubes should also be cleaned to ensure
complete removal of any foreign matter deposits and solder pastes after installation. The use of
water filters could also be considered to prevent the introduction of foreign matter in the water.
Furthermore, the quality and content of the water should be determined and its potential to cause
pitting assessed. The extent of replacement or modifications to the water distribution system would,
to some degree, depend on the results of such water analyses.

REFERENCES

1. Internnl Corrosion of Water Distribution Sysrem. Report of Cooperation Research, AWWA Research Foundation, USA,
1985.
2. Billiau, M., Drapier, C., Muteriaux et Techniques, Nos 1 and 2.