Which term describes the pipeline that carries unheated water?

The term that describes the pipeline that carries unheated water is cold water service. This designation specifically refers to systems or lines that transport water that has not been heated, typically sourced directly from municipal supplies or wells. Cold water service is essential in plumbing as it facilitates various applications, such as providing water for drinking, cooking, bathing, and other household uses without any alteration in temperature.

Hot water service, in contrast, refers specifically to pipes carrying heated water, typically from a water heater. Waste piping and drainage systems are related to the removal of wastewater and do not pertain to a pipeline that carries unheated water. Understanding these distinctions is important for recognizing the different functions and applications of various plumbing systems.