What encompasses the water service and house sewer within plumbing?

The water service and house sewer are integral components of the plumbing infrastructure that facilitate the supply and disposal of water within a building. The water distribution system specifically refers to the network of pipes and fittings that delivers potable (drinking) water to various fixtures throughout a structure, including sinks, showers, and toilets. This system ensures that water is adequately supplied under pressure for various uses in the home.

While the drainage system deals with the removal of wastewater and includes the pipes that carry sewage away from plumbing fixtures to a sewer or treatment facility, it is distinct from the water distribution system, which is focused on the delivery of clean water. Fixtures are the actual plumbing appliances (like sinks, toilets, etc.) that utilize water, and while the sanitary system does play a role in managing waste and ensuring cleanliness, it doesn't specifically encompass both the water service supply and the house sewer.

Thus, the correct identification of the water service and house sewer within plumbing contexts is the water distribution system, which plays a vital role in providing clean water for consumption and usage, contrasting with systems that focus on waste management.