Which material is not appropriate for use in water main pipes?

Ceramic is not an appropriate material for use in water main pipes primarily due to its brittleness and susceptibility to cracking under pressure or impact. While ceramics have excellent corrosion resistance and thermal properties, their structural integrity cannot withstand the physical stresses often encountered in water transmission systems.

In contrast, materials like galvanized iron, stainless steel, and PVC have been widely used in water main applications. Galvanized iron provides durability and resistance to rust, although its use has decreased in some applications due to corrosion concerns over time. Stainless steel is known for its strength and corrosion resistance, making it suitable for both drinking water and waste applications. PVC is lightweight, resistant to corrosion, and easy to install, which adds to its popularity in modern water distribution systems. Each of these materials offers specific advantages that align with the demands of water main constructions, while ceramic does not meet those operational needs effectively.