Wastewater Unit Process Inspection: Septic Tank Dosing Siphon Sand Filter

A sand filter is often a watertight concrete box filled with a specific sand material that will aid in naturally occurring chemical and biological breakdown of the sewage. Several small pipes are placed in a gravel-filled bed on the surface of the sand, and effluent is pumped in controlled doses to ensure uniform distribution. Automatic dosing siphons are now being used more commonly with the sand filters. The Wastewater Inspection Unit Process Septic Tank Dosing Siphon Sand Filter app should be used by an inspector to determine the siphon and sand filter system is operational. The app will address safety and maintenance issues such as if the grease trap is properly maintained, the frequency of septic tank pump, operation of the dosing siphon is allowing for proper drip and number of sand filters. The inspector will also need to ensure that the soil conditions are meeting regulations, the elevation and slope of the sand is correct, and the distribution of the influent. The inspector should note any odors or other concerns about the filtration system.