What encompasses the plumbing system?

The plumbing system encompasses the complete network involved in both supplying water and managing waste within a building. This includes the water supply pipes that deliver fresh water, the drainage pipes that remove wastewater, and the systems designed for waste management. Proper plumbing ensures that clean, potable water reaches fixtures like sinks and toilets while facilitating the safe removal of sewage and wastewater away from the property.

This definition highlights the critical role of both water supply and drainage components in plumbing, making option B the most comprehensive and accurate representation of what constitutes a plumbing system. The other options are limited in scope and do not cover the full functionality of plumbing systems that are essential for residential and commercial structures.