Much of the plumbing work in populated areas is regulated by government or quasi-government agencies due to the direct impact on the public's health, safety, and welfare.
Plumbing installation and repair work on residences and other buildings generally must be done according to plumbing and building codes to protect the inhabitants of the buildings and to ensure safe, quality construction to future buyers.
If permits are required for work, plumbing contractors typically secure them from the authorities on behalf of home or building owners. In the United Kingdom the professional body is the Chartered Institute of Plumbing and Heating Engineering (educational charity status) and it is true that the trade still remains virtually ungoverned; there are no systems in place to monitor or control the activities of unqualified plumbers or those home owners who choose to undertake installation and maintenance works themselves, despite the health and safety issues which arise from such works when they are undertaken incorrectly; see Health Aspects of Plumbing (HAP) published jointly by the World Health Organization (WHO) and the World Plumbing Council (WPC).
Plumbing equipment includes devices often hidden behind walls or in utility spaces which are not seen by the general public.
Therefore, it happens also that alone make minor repairs or improvements hydraulic.The houses usually they exchange seals and pipes, which has already gathered a lot of dirt and hair and suds.
In addition, home handymen often deal with repairs washing machines standing in a bathroom or dishwashers standing in the kitchen.So they can save some money and demonstrate their efficiency in front of family.