What type of pipe is generally used as leaders in tall buildings?

Wrought iron pipe is typically used as leaders in tall buildings due to its strength, durability, and resistance to corrosion. This type of pipe can effectively handle the pressures and varied temperatures encountered in vertical applications, making it suitable for transporting rainwater or drainage without the risk of failure. Additionally, the solid composition of wrought iron supports the structural needs of tall buildings, particularly in areas where pipes may be subject to physical stress or environmental factors, such as wind and temperature fluctuations.

While other materials may be used in certain applications, wrought iron's proven performance in building infrastructure, its longevity, and its ability to withstand high-pressure scenarios make it the preferred choice for leaders in tall structures.