What is the first step to take when investigating a water system for performance issues?

The first step when investigating a water system for performance issues is to check for maintenance history. This step is crucial because it provides insight into the system's previous performance, including any recurring issues or repairs that have been made. It allows for a thorough understanding of how the system has been functioning over time and helps identify patterns or trends that may point to the underlying causes of current performance issues.

By reviewing maintenance records, you can ascertain whether there have been any significant repairs, routine maintenance that may have been neglected, or parts that may have been frequently replaced. This historical context can guide the investigation by highlighting areas that require further scrutiny or suggesting that certain components may be near the end of their useful life.

While checking for external water sources, testing water quality parameters, and installing new fixtures can be relevant steps in dealing with performance issues, they are generally more focused on specific aspects of the system rather than providing the foundational understanding that maintenance history offers. Focusing on maintenance history equips you with the information needed to make informed decisions about subsequent investigative or corrective actions.