It should not be located in east, north or northeast direction.
It should not be in northeast and center place of the house.
It should not be near kitchen and under the stairs.
If a change room is built in bathroom, it should be in South or West direction.
The mirror should be on northern or eastern wall.
The door should not be in south-west direction.
Washing machine can be placed in south-east and north-west direction directions.
Vastu tips for water tank
The best direction for water tank is North-east of the plot. 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. Avoid water sump at the center of the house.