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
Similar repairs are done at home.But in such buildings often you have to also carry out work related to repair leaks resulting in the installation of plumbing. This is because the state of the responsibility of owners of housing blocks and homes can have installations mounted a dozen years earlier. Similar situation may occur also in the case of hospitals.
Galvanized steel potable water supply and distribution pipes are commonly found with nominal pipe sizes from 3?8 inch (9.5 mm) to 2 inches (51 mm).It is rarely used today for new construction residential plumbing.
Steel pipe has National Pipe Thread (NPT) standard tapered male threads, which connect with female tapered threads on elbows, tees, couplers, valves, and other fittings.
It remains in common use for repair of existing "galv" systems and to satisfy building code non-combustibility requirements typically found in hotels, apartment buildings and other commercial applications.It is also extremely durable and resistant to mechanical abuse. Black lacquered steel pipe is the most widely used pipe material for fire sprinklers and natural gas. Źródło: https://en.wikipedia.org/wiki/Plumbing.