Precast system of septic tank of 40’x32’ house plan is given in this Autocad drawing file. Ground plan details are given in this drawing model. The width of the plan is 1200mm and height of the tank is 2400mm. Manhole and water levels are mentioned in this drawing model. For more details download the Autocad drawing file. Thank you for downloading the Autocad drawing file and other CAD program files from our website.