This type of system consists of a series of connected chambers. They are also well suited to areas with high groundwater tables, where the volume of influent to the septic system is variable (e.g., at a vacation home or seasonal inn), in an area where gravel is scarce, or in areas where other technologies such as plastic chambers are readily available. The primary advantage of the chamber system is increased ease of delivery and construction. The chamber system serves as an alternative design to the gravel/stone system. The gravelless systems can be manufactured with recycled materials and offer a significant savings in carbon footprint.Īn example of a gravelless system is the chamber system. They take many forms, including open-bottom chambers, fabric-wrapped pipe, and synthetic materials such as expanded polystyrene media. Gravelless drainfields have been widely used for over 30 years in many states and have become a conventional technology replacing gravel systems. The solids stay in the tank while the wastewater is discharged to the drainfield for further treatment and dispersal. Heavy solids settle to the bottom of the tank while greases and lighter solids float to the top. More detailed information on specific technologies can be found in Fact Sheets.Ī septic tank is a buried, watertight tank designated and constructed to receive and partially treat raw domestic sanitary wastewater. See below for illustrations and descriptions of various types of conventional and alternative septic systems. The list is not all-inclusive there are many other types of septic systems. Below are ten of the most common types of septic systems used, followed by illustrations and descriptions of each system. These factors include household size, soil type, site slope, lot size, proximity to sensitive water bodies, weather conditions, or even local regulations. The design and size of a septic system can vary widely, from within your neighborhood to across the country, due to a combination of factors.
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