Plumbing a bathroom involves installing and connecting pipes for the sink, toilet, and shower or tub. Start by installing the main water lines and connecting them to fixtures. Ensure that all connections are secure and leak-proof. Install the drain lines and connect them to the main sewer line. Test the system for leaks and proper function before finishing with drywall and fixtures.

Install and connect pipes for all fixtures, ensure secure connections, and test for leaks.