What are the key components and layout of residential plumbing diagrams?

Residential Plumbing diagrams typically include key components such as pipes, fixtures, valves, and water heaters. The layout of these diagrams shows the connections and flow of water throughout the house, including the main water supply line, branch lines, and individual fixtures like sinks, toilets, and showers. Valves are also indicated to control the flow of water to different areas.