What should be evaluated during the selection process of pumps for varying system demands?

In the selection process of pumps for varying system demands, evaluating the need for parallel operation is crucial. This is because pumps may need to work together to meet fluctuating flow rates and pressure requirements in a system. When demand changes, having pumps that can operate in parallel allows for adjustments in capacity and ensures that the system can handle peaks in usage without depletion of resources or loss in performance. This adaptability is essential for maintaining efficiency and reliability in plumbing systems, as it allows for redundancy and increased operational flexibility.

Considering other options, while pump efficiency ratings contribute to long-term operational costs and servicing requirements affect maintenance planning, they do not specifically address the variation in system demands as directly as the need for parallel operation does. The color of the pump has no bearing on its performance or suitability for varying demands, making it irrelevant in this context.