Yes, house plans typically include plumbing layouts and fixtures. The plumbing layout is an important part of the overall house plan, as it shows the location of pipes, fixtures, and appliances that are needed to provide water supply and drainage to the house.
Plumbing layouts can vary depending on the specific house design and the needs of the homeowner. In general, the plumbing layout will show the location of water supply lines, waste pipes, and vent pipes, as well as the location of fixtures such as sinks, toilets, bathtubs, and showers. The layout may also indicate the size and type of pipes to be used, as well as any specialized fixtures or appliances such as water heaters, sump pumps, or water treatment systems.
It's important to ensure that the plumbing layout complies with local building codes and regulations, which may specify requirements for the type and size of pipes, the location of fixtures, and other plumbing details. A licensed plumber or builder can help you ensure that the plumbing layout is designed and installed correctly to meet local codes and regulations.