The principle purpose of an altitude valve on an elevated tank is to...

The principle purpose of an altitude valve on an elevated tank is to control the maximum filling level in distribution storage. This is crucial because the altitude valve serves to ensure that the tank does not overflow by closing when the water reaches a predetermined level. By doing so, it helps to manage the water supply effectively, preventing waste and potential flooding in surrounding areas.

The altitude valve is vital in maintaining a balance in the water system, as it directly influences the operation and efficiency of water distribution. By managing the filling levels, it ensures that there is adequate storage for water supplies while also protecting the structural integrity of the tank and the surrounding environment. This capability supports the overall goals of water management within the distribution system.