What is the purpose of an overflow pipe in a tank?

The purpose of an overflow pipe in a tank is primarily to drain excess water from the tank. This component is essential for preventing overfilling, which can lead to spillage and potential damage to the tank or surrounding area. In situations where the tank reaches its maximum capacity, the overflow pipe allows the excess water to exit in a controlled manner, thereby maintaining the operational integrity of the system and ensuring that the water level remains within safe limits.

Maintaining appropriate water levels is crucial in water treatment systems as it directly impacts operational efficiency and safety. An overflow pipe ensures that if there is an unexpected influx of water, the tank does not become overloaded, which could cause structural issues or contamination risks.

The other options focus on functions that are not directly related to the role of an overflow pipe, such as maintaining temperature, supplying water, or monitoring quality, which all have their own dedicated mechanisms and systems in water treatment processes.