As water pumps into the tank, its air pressure increases until it reaches a specific, preset level. When it reaches that point, the air pressure will push water through your home’s plumbing system.

A motor pump normally cost Rs 2,000 but is now being sold for Rs 3,000 or more. Kumari, a resident of Radha Nagar said, “Without the pumping water up and storing it in the overhead tank, our ...