What should not be used to mark the location of valves?

Marking the location of valves is essential for easy access and maintenance in water systems. Using trees as a method of marking valve locations is not advisable for several reasons.

Trees can grow and change over time, potentially obscuring the valve location or making it difficult for operators to locate them. Additionally, trees may require pruning or removal, which could permanently alter or remove the marker. Furthermore, trees can also contribute to a logistical challenge if they are planted close to valves, as they might hinder access for maintenance and repairs.

In contrast, materials such as rocks, stakes, or fences can serve as more reliable physical markers as they are less likely to change position or impede access to the valve itself. Rocks provide a visible but less intrusive marker option, while stakes and fences can be specifically placed to indicate exact locations, remaining constant over time.