What is a disadvantage of a cast iron boiler?

The disadvantage of a cast iron boiler being prone to leaks in-between the sections relates to the construction and design characteristics of cast iron itself. Cast iron boilers are typically composed of multiple sections that are joined together using gaskets or seals. Over time, due to thermal expansion and contraction during heating and cooling cycles, these seals can wear out or fail, resulting in leaks.

This issue is particularly significant because leaks can compromise the efficiency of the boiler and may lead to water damage or other complications, making it a critical concern for maintenance and operation. While other factors such as corrosion, assembly difficulty, and cost may affect a boiler's performance or selection, the propensity for leaks is a specific drawback tied closely to the physical nature of a cast iron boiler's sectioned design and its operational demands over time.

Understanding this aspect is crucial for someone studying boiler systems, as it emphasizes the importance of regular maintenance and inspection in prolonging the lifespan and efficiency of cast iron boilers.