an Encyclopedia on Vastu Shastra
Septic tank should be placed in such a way that it doesn’t fall in the directions like South-east, South-west, North and North-east.The Ideal Direction
The ideal location for septic tank is West of North-West or East of South-East.
The segregation of septic tank should be in a way that the water goes in eastern side while excretion waste goes to the western side.
Vastu Shastra suggests to make length of septic tank on East-West side while breadth on South-North.Level of Spetic Tank
It should always be constructed to the ground level and must not touch the main wall of house i.e. compound wall.The Drainage
Make sure the drainage pipes in toilet and bathroom have their passage in the West or North-west. While to the contrary kitchen pipes should have their passage in the East or North.
Avoid drainage pipes in Southern portion of house and if it has been made then ensure that their passage should be made in East or North.