Galvanized pipes are steel pipes that have been coated with a layer of zinc to prevent corrosion. Over time, however, the zinc can wear off, leading to rust and corrosion within the pipe. This can cause leaks, reduced water pressure, and water quality issues. Cast iron pipes, on the other hand, provide durability and resistance to heat and fire, making them a trusted choice for many plumbing applications. Despite their longevity, cast iron pipes can also face deterioration and blockage over time.