VASTU FOR WATER TANK
FIGURE - 1
  1. It is preferred to make the overhead Water Tanks in theSouth - West side of the house as shown in Figure - 1, since this portion of the house should be highest.
  2. Under ground water tank should be provided in the North - East portion of the house as shown in Figure - 2, since the ground level on this side should be the lowest.
  3. Avoid making Overhead water tanks in other areas incase they are made then they should be placed such that their top should be lower than the building portion in the South - West of the house.
FIGURE - 2