Abstract
The paper presents causes of the failures of hot and cold water systems. Most often they occur in the case of installations built with metal pipes and result from the use of improper materials and the adoption of wrong solutions. Failures are caused by chemical and electrochemical corrosion resulting from design and manufacturing errors. Further on, the corrosion process is briefly described. The most common causes of corrosion of hot water installations are discussed and examples of them are presented. On the basis of observations it can be stated that despite the knowledge about corrosion of hot and cold water installations, some of the them are improperly designed and constructed and exhibit high failure rates. The summary discusses the most common errors for different installation solutions.
Highlights
The cold and hot water systems failures, resulting in more or less intense water leaks are common for all buildings in use
The analysis of the existing failures shows that the main causes of these failures are: - improper quality of materials used, - chemical corrosion of pipes, - electrochemical corrosion of pipes, - selective leaching of fittings and valves, - mechanical damage to the system components
Cold and hot water system failures have always been a problem in systems made of galvanized steel pipes [1]
Summary
The cold and hot water systems failures, resulting in more or less intense water leaks are common for all buildings in use. The water systems were made of galvanized steel pipes. It can be seen that there have been more cold water than hot water failures in this building, opposite to the typical distribution. Cold and hot water system failures have always been a problem in systems made of galvanized steel pipes [1]. Proper maintenance allows to extend the service life and potentially reduce costs
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