Distribution system is used to describe collectively the facilities used to supply water from its source to the point of usage. There are two types of systems involved:
Local System: In local system, water supply comes straight from the ground, rather than from a stream or pond. A hole is made in the ground which can be either a dug-well of big diameter to admit a man and his spade, or a bore hole of small dimensions made by mechanical means, or just enough to admit the necessary pump or suction pipe. Most modern wells are lined with pre-cast concrete cylinders and bore holes with steel or PVC tubing. The necessary amount of water is drawn for direct use or stored in a storage tank
LOCAL SUPPLY
Central System: A central system supplies water to communities, factories and farm and non-farm projects. At the water purification plant, the quality of water is raised to an acceptable level to meet a number of domestic water requirements such as taste, temperature, turbidity, color, odor, chemical analysis, and bacteria content. Rate of water demand depends upon many factors and local conditions such as: the size of community (i.e., population), the economic conditions and standard of living of the community to be served, pressure under which water will be supplied consumption increases with increased pressure and water charges
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