The planning, design, construction and installation of water supply, drainage and sanitation and gas supply systems shall be in accordance with the provisions of Water Supply and Drainage rules of Nagpur Municipal Corporation of Nagpur and Part IX Plumbing Services - Section 1 water supply, Section 2 Drainage and Sanitation and Section 3 - Gas Supply of National Building Code of India.

Requirements of Water Supply in Buildings - The total requirements of water supply shall be calculated based on the population as given below:

Occupancy	Basis
Residential Building	5 Persons/Tenement
Other Buildings	No. of Persons on occupant load and area of floors given in Table B

The requirements of water supply for various occupancies shall be as given in Table 12, 13 and 14 or as specified by the Authority from time to time.

Requirements of Sanitary Fittings - The sanitary fittings and installations for different occupancies shall be as given in Table 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25 and 26

The total requirements shall be calculated based on the population as per rule No. 26.2