This question ostensibly implies to include "not other types of pipe materials". Well, the reasons are broad and vary depending on the project requirements. Since we are not talking about a specific project, we will explore the general reasons that make ductile iron pipe the best choice for your plumbing project.

Butterfly valves can also come in many shapes and sizes. This valve also functions through the use of an internal gate. The difference between a butterfly valve and a gate valve is the way in which the gate valve operates inside the gate valve.

Air valves are hydromechanical devices designed to automatically release air and wastewater gases or admit air during the filling, draining or operation of liquid piping systems for water and wastewater services.

Ductile Iron pipes normally possess thicker pipe walls and are generally stiffer than steel pipes. As such, it relies less on side fill soils to support external loads so it is necessary to achieve highly-compacted soils for ductile iron pipes for sustaining external loads.

Cement-mortar linings have been successfully used to protect the interior of iron pipe and fittings since 1922. Cement linings prevent tuberculation by creating a high pH at the pipe wall and ultimately by providing a physical barrier to the water.