What does a plumbing system include?

A plumbing system encompasses various components that work together to provide water supply and drainage. The correct choice highlights the comprehensive nature of plumbing systems by including both water distribution pipes and drainage systems.

Water distribution pipes are responsible for delivering potable water to various fixtures and appliances within a building, ensuring that clean water is accessible for daily use such as drinking, cooking, and bathing. Drainage systems are equally essential as they remove wastewater from fixtures and transport it to the sewer system or an on-site treatment system.

Other options are limited in scope. For instance, focusing solely on fixtures and faucets disregards the entire infrastructure needed for a functioning plumbing system. Similarly, mentioning only drainage pipes ignores the critical water supply side of plumbing. Lastly, specifying outdoor plumbing alone excludes vital indoor components, which are integral to the plumbing system as a whole. Recognizing both water distribution and drainage highlights the interconnected functionality necessary for effective plumbing.