What is commonly required for a water system to avoid trapped piping?

A proper slope in the piping of a water system is essential to prevent the accumulation of water, which can lead to trapped piping. When pipes are installed with an adequate slope, typically towards a drain or a discharge point, gravity facilitates the flow of water and minimizes the risk of stagnation. This is crucial in maintaining a functional plumbing system, as it prevents issues such as backflow, contamination, and the creation of air pockets that can disrupt water transport.

Other aspects of maintenance, such as regular inspections and frequent flushing, while beneficial in certain contexts, do not directly address the design and installation aspect necessary to prevent trapped pipes in the first place. High pressure in a system also does not contribute to avoiding trapped piping; instead, it can lead to other problems such as leaks or bursts if not managed properly. Thus, ensuring proper slope during installation is the most effective proactive measure to avoid trapped piping in a water system.