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 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
They work full-time in a variety of plants, hydraulic or sign contracts-orders for certain services.
Nowadays, self-employed persons often assume hydraulic websites, which include information on the services rendered by them and their price list.They also by posting information about their activities on bulletin boards, and even spread leaflets around the city to encourage use of their services. So they can get regular customers, who will often benefit from their services.
They can be carried out on behalf of local authorities, if any part of the village needs to be connected to the municipal sewer system or the village was flooded by torrential rains.
Depending on the type of failure, they can order the execution of hydraulic works in normal mode, or call the emergency hydraulic.
Such hydraulic ambulance is able to reach a flooded home, even during the weekend.
While minor work will be done by appointment convenient for the homeowner term..