Definition of plumber - from Wikipedia
The word "plumber" dates from the Roman Empire. The Latin for lead is plumbum. Roman roofs used lead in conduits and drain pipes and some were also covered with lead, lead was also used for piping and for making baths. In medieval times anyone who worked with lead was referred to as a plumber as can be seen from an extract of workmen fixing a roof in Westminster Palace and were referred to as plumbers "To Gilbert de Westminster, plumber, working about the roof of the pantry of the little hall, covering it with lead, and about various defects in the roof of the little hall". Thus a person with expertise in working with lead was first known as a Plumbarius which was later shortened to plumber.
A plumber is a tradesperson who specializes in installing and maintaining systems used for potable (drinking) water, sewage and drainage in plumbing systems. The term dates from ancient times, and is related to the Latin word for lead, "plumbum".
Źródło: https://en.wikipedia.org/wiki/Plumber
Useful plumbing
Useful plumbing services allow us to find good ways to reduce water bills. One such method is the installation of automatic flushing, which itself will launch its tank with water after using the toilet by us and cums the amount of water that is provided. We can also be mounted in the bathroom faucet supported on a photocell, from which the water will be flying only when the photocell registers the execution of movements with your hands. As a result, no longer a situation occurred that the tap water will bleed, but for a long time no one in the bathroom. Plumber can also refer us to other methods allowing to save water, which is much cheaper than installation of these devices, and can be equally effective.
Why a professional plumber is well-paid
Professional plumber is still a well-paid profession, because the failures occurring in the water and sewage networks are still very frequent. More often there are failures washing machines or dishwashers, which can prevent only a plumber. At the same time among plumbers, there is a lot of competition, so they are trying at all costs to attract and retain potential customers through various promotions. They can also carry out work tiling and painting if required finish the bathroom, which they do. However, many plumbers, dissatisfied with their wages go abroad in search of better-paid work and perform activities there, they do not want to do local plumbers.