Septic tank has to be constructed or located as per vastu shastra , it is also called as Cesspool or Cesspit an underground reservoir of wastage, is a pit conservancy tank or covered cistern which can be used to dispose of urine and feces and more generally of all sewage, discharges and refuse. It is a more antiquated solution that a sewer system. Traditionally, it was a deep cylindrical chamber dug into the earth, having approximate dimensions of 1 meter and 2-3 meters depth. Their appearance was similar to that of a hand-dug water well.many residents in previous days has constructed the septic tank at South, West , Southwest, Vayavya (Northwest) corners, and the septic tank should be constructed in the paishacha area; the open area all around the building. It should not be exactly in the Northeast, Southeast, Southwest, Northwest and Brahamsthana.
Any faulty construction of septic tank in the northeast may spoil the ground water sources. Its foul smell, mixed with benefit solar and magnetic radiations, will enter the house. In the Southeast, kitchen is considered best. The activities of creation in the kitchen don’t match with the activities of destruction in the septic tank.
In olden days there was no septic tank for toilets. Today they have become necessary. For modern septic tanks a pit has to be dug. Location is to be in the West or Northwest. In no other direction should it be sunk. If latrine is planned for in the east, away from eastern compound wall in line with the house, without touching its wall. The pit has to be sunk in the east measuring half the area. South west is the most suitable place for toilets. This is the recorded in our ancient texts. Modern writers have transported the same in their book, because they lack experience. Septic tank should be arranged in the north without touching compound or house, in the middle of the open area. Similarly in the East also. Latrines without pits can be there in the south west. No harm, but they should be in height position than the ground level of the house flooring. First preference has to be placed to constructed the septic tank is middle East or middle north only. The remaining parts are not yet suggested
But today a pit is required for septic tanks, but then a pit in the south west is wrong as per vaastu . Not only wrong but very harmful. If latrine is planned in the south west it should be on a higher level without pit and pit can be arranged in one half of the north. Or in one half of the east. If latrine is planned for north west it should not touch north wall and compound wall. A room should be built alongside the house and also septic tank can be in one half of the north. Toilets can be arranged as shown in the models here. The latrine can face any direction but W.C. should be invariably to north and south. It is the best direction. It should never be towards east. It is not proper nor it is auspicious. Perfection vastu for home is always advisable
There is a legend in the Ramayana which is worth mentioning here. Rama went in exile into forests along with Sita and Laxmana at the command of Dasaratha. Bharata returns from his grandfather’s place. He was pained to know that people suspected him for the exile of Rama. Then he swore “I”d fall into the worst place where people relieve themselves against the sun defiling the Lord, go”. So east is sacred. Evidence in Ayurveda also supports this. Latrines (WC or Western Commode) and bathrooms can be arranged inside the house as shown in this diagram.