Which material is not typically used for plumbing pipes?

Glass is generally not used for plumbing pipes due to its fragility and the potential for breaking under pressure or when impacted. Plumbing systems require materials that can withstand constant pressure, temperature fluctuations, and the physical stresses associated with water flow, all conditions where glass would be prone to failure.

Materials like polyvinyl chloride (PVC), copper, and cross-linked polyethylene (PEX) are commonly used in plumbing for various reasons. PVC is lightweight, easy to install, and resistant to corrosion, making it suitable for a variety of applications. Copper is known for its durability, longevity, and natural resistance to bacteria, which contributes to its selection for water supply lines. PEX is flexible and resistant to scale and chlorine, making it a popular choice for modern plumbing systems.

Thus, glass's inherent characteristics make it an impractical choice for pipes within the plumbing industry.