Essential elements for the human beings to live in a house with a minimum comfort are water supply, drainage arrangements and electrical power supply.

Biologically, water is required for the human beings for the satisfactory performance of physiological organisms, as a circulatory fluid, as a carrier of nourishing food and for the removal of products of wastes. Man uses water for variety of purposes. At the domestic end, a minimum requirement of water is needed for drinking, cooking, bathing and cleaning. Hence, a certain amount of water per head per day needed is being recommended. Accordingly the water requirement has to be made.

Disposal of wastewater, that is, used water from kitchen, toilet, ...

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