![]() ![]() Set it level where it's going through the wall or under the footing, and from there run with about an 1/8" per foot of pitch (slope) toward the septic tank. 40 going a foot through the wall or under the footing, and to a minimum of five feet outside the building toward the tank. It does not use a mechanical means other than gravity to discharge the waste from the tank to the drain field. Plan for the flow to go downhill from here, as this is exactly what a gravity fed system is all about. Excavate to at least 2 feet deep and drill a hole through the wall, or go deeper and go under the footing, whichever is desired, or necessary. ability of the soil to drain and filter wastewater.įind where you want to go into the building relative to where you want to place the septic tank.soil type and layering (sand, clay, rock, and where it is located relative to depth).Soil test findings that influence the design include things like:.location of the well and/or neighboring wells.intended purpose and perceived water use based on the size of the dwelling/building the system will service.Site survey findings that influence the design include things like:.government agency responsible for promoting safe environmental practices Go to source X Trustworthy Source United States Environmental Protection Agency Independent U.S. ![]() ![]() After this, the appropriate permits and approvals can be applied for. X Research source The system then can be designed based on the findings of the survey and results of the soil test. The first step in any septic installation is to perform a site survey and do a percolation (soil) test on the area where the POWTS is going to be installed. ![]()
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