What is the role of a pressure regulator in an irrigation system?

A pressure regulator plays a crucial role in maintaining a consistent pressure within an irrigation system, which is essential for efficient water delivery. When the pressure is too high, it can lead to uneven water distribution, potential damage to irrigation components, and excessive water runoff. By regulating the pressure to a specified level, the pressure regulator ensures that all parts of the irrigation system, including emitters and sprinkler heads, operate effectively, delivering water uniformly and minimizing waste. This consistency is vital for promoting healthy plant growth and optimizing water use efficiency. The other options relate to functions that are not performed by a pressure regulator. For instance, increasing water flow during peak demand is more about flow management than pressure regulation, filtering impurities is the role of a filter, and monitoring soil moisture levels involves sensors or controllers, not pressure regulation.