What type of pipe is typically involved in carrying or disposing of domestic sewage?

The correct choice, drain, refers specifically to the type of piping system used to carry away domestic sewage and waste water from buildings. Drains are designed to transport water and waste away from fixtures like sinks, toilets, and tubs to the sewage disposal system or sewage treatment facility. This function is critical in plumbing systems as it ensures sanitary conditions and proper waste management.

Vent pipes, while important in maintaining air pressure within plumbing systems and preventing sewer gases from entering buildings, do not directly carry sewage. Soil pipes, which are a subtype of drain piping, specifically handle the waste material from toilets and are also involved in transporting sewage, but they are usually a part of the more extensive drain system. Service pipes are typically involved in delivering potable water to a property rather than disposing of sewage.

Understanding the role of each type of pipe helps clarify why drains are the correct answer in the context of carrying or disposing of domestic sewage.