What Does a Plumber Do? Whether you want to have a new residential plumbers sink installed or want to repair a clogged sink, plumbers can help you. They can also design plumbing systems to provide clean water for your home. Plumbing jobs are found in homes, businesses, factories, hospitals, and airports. These workers install pipes, fixtures, water heaters, and water and sewer systems. Plumbers are primarily trained in an apprenticeship program, which requires a high school diploma and four or five years of on-the-job training. Apprenticeship programs are usually sponsored by contractors or local unions. Plumbers need a high level of physical strength and motor skills, as well as good vision and verbal and problem-solving skills. They must also be able to read blueprints and understand building regulations. Some plumbers also take courses in engineering or building services engineering. Plumbers must be licensed to work in most states. Some states require a master plumber license, which requires at least 8,000 hours of on-the-job experience. They must also pass several state examinations. Plumbers must have a high level of communication skills, as they will have to explain the work they do to customers. They also need good listening skills, as they will have to listen to customers’ complaints and understand the root of their problems. Plumbers may work alone or as part of a team. They may work for a large company or a small one. Some may specialize in certain fields, such as ventilation or air conditioning.