Vastu Shastra recommends some principles for
construction of water sump in the building. According to Vastu, water
elements should be available in the Northeast of the building. The
following are some principles to build overhead and under ground water
tanks.
Under Ground Water Tank/Water Sump
The best place for digging the sump is the North-east of the plot.
This leads to increase in wealth, prosperity and knowledge. While
digging the sump, an axis should be drawn from the Northeast corner to
southwest corner. The sump should be dug to the right or left side of
axis. The sump in east of northeast is most beneficial and the sump in
north of northeast is also good.
Water sump should not be towards Southeast or Northwest. The sump in
the Southwest is worst. Avoid water sump at the center of the house.