Water Tanks (Original Version)

There are few cities in the U.S. with the number of tall buildings that New York City has, and with a water system as old. For fire prevention, taller buildings are required to have two sources of water, and one of those is usually a tank on the roof.

Water Tanks (Video 2)

There are few cities in the U.S. with the number of tall buildings that New York City has, and with a water system as old. For fire prevention, taller buildings are required to have two sources of water, and one of those is usually a tank on the roof. Updated version.