Constructing a sanitary and waste water system for a double storey house involves designing and installing a system that efficiently and effectively removes waste water from the property. This involves determining the most appropriate location for the septic tank and drain field, as well as ensuring that all pipes and fittings are properly installed to prevent leaks and other issues.

The first step in constructing a sanitary and waste water system for a double storey house is to perform a site evaluation to determine the soil composition and topography of the property. This information is used to determine the most appropriate location for the septic tank and drain field, as well as to ensure that the system meets all local codes and regulations.

Once the site evaluation is complete, the septic tank is installed and connected to the main waste water line from the house. A drain field is then constructed, which typically involves digging trenches and laying perforated pipes in gravel-filled trenches. The trenches are then covered with soil to allow for proper drainage.

Throughout the construction process, it is important to ensure that all pipes and fittings are properly installed to prevent leaks and other issues. Regular maintenance of the system, including regular pumping of the septic tank, is also important to ensure the system functions properly.