They work full-time in a variety of plants, hydraulic or sign contracts-orders for certain services.Some plumbers also run his own business, under which perform minor plumbing services.
Nowadays, self-employed persons often assume hydraulic websites, which include information on the services rendered by them and their price list.
So they can get regular customers, who will often benefit from their services.
Plumbing is any system that conveys fluids for a wide range of applications.Heating and cooling, waste removal, and potable water delivery are among the most common uses for plumbing however plumbing's not limited to these applications.1 Plumbing utilizes pipes, valves, plumbing fixtures, tanks, and other apparatuses to convey fluids.2 Trades that work with plumbing such as boilermakers, plumbers, and pipefitters are referred to the plumbing trade.In the Developed world plumbing infrastructure is critical for public health and sanitation. Źródło: https://en.wikipedia.org/wiki/Plumbing#Systems
However, in the case of schools you need to equip the bathroom in the right amount of sinks, where you will be able to wash their hands after using the toilet.
In schools, sports can also stand up showers..