What happens when water is added to the boiler?

When water is added to a boiler, initially, the water level drops before it starts to rise. This phenomenon occurs due to the displacement effect caused by the addition of water. When you introduce water into a boiler that is already filled with water and steam, the steam expands to accommodate the new water volume. As a result, the initial effect can lead to a temporary drop in the visible water level until the newly added water begins to heat up and starts converting into steam.

This interaction can also affect the pressure within the system. However, the direct response of the water level is the primary focus of this question. Understanding this concept is crucial for boiler operators to maintain proper water levels and ensure safe operations, as fluctuations in water levels can lead to dangerous conditions like low water scenarios or insufficient steam generation.