If you’re a homeowner, chances are you’ve called local plumbers to your house before. But you may be curious about what exactly is in a plumber’s job description. In general, a plumber is someone who works on residential, commercial, or industrial properties on things that are related to water and water systems. They work to install, repair, and maintain the systems like drains and pipes. For example, if you have a pipe burst or a running toilet, a plumber can help.