The total cost of installing or replacing your septic tank is largely dependent on the type of system you choose. Here are some of the most common kinds of tanks:
Anaerobic Septic System
Anaerobic systems are a common choice for many homeowners because they don’t require additional power or chemicals. An anaerobic system contains bacteria that do not need oxygen to survive. The bacteria break down solid waste, and the remaining liquid waste is piped out and distributed under the soil. The waste is naturally recycled as the water passes into the soil.
These systems cost about $2,000 to $5,000 (CAD 2,600 to CAD 6,400) to install.
Aerobic Septic System
Unlike anaerobic systems, aerobic systems use bacteria that do require oxygen to survive. Oxygen is pumped into the tank to activate the bacteria, which then feed on solid waste. Aerobic systems work well where the soil isn't favorable for other systems and the groundwater table is high. It's a good option for homes located near a body of water.
Aerobic systems are more expensive to install. Fixr says you should expect to pay between $10,000 and $20,000 (CAD 13,000 and CAD 25,800).
Gravity Septic System
A gravity septic system uses gravity for filtration and water flow. They need to be installed on a gentle slope to enable water flow without a pump.
Installation costs $1,500 to $4,000 (CAD 1,900 to CAD 5,100).
Conventional Septic System
The conventional septic system consists of a septic tank and a trench that acts as a drain field. The trench is constructed on stone or gravel and allows water to pass through. To prevent sand or dirt from contaminating the clean soil, geofabric is installed on top of the trench. A conventional septic system needs a large space to operate.
Installation cost $2,000 and $7,000 (CAD 2,600 and CAD 9,100).
Mound Septic System
If your groundwater is close to the surface, a mound septic system is the best choice. A sand mound is constructed on the septic system area to pump wastewater from the tank into the mound in small quantities. The sand then filters the water before it gets into the soil and groundwater. This design requires a lot of space.
They’re also expensive to install because a sand mound has to be constructed. Total cost ranges from $10,000 to $20,000 (CAD 13,000 and CAD 25,800).
Chamber Septic System
Chamber septic systems have recently become a popular choice. They’re similar to conventional systems, except plastic chambers are used in the drain field instead of gravel. These are easier to construct and have a smaller carbon footprint.
They cost $3,500 to $10,000 (CAD 4,500 to CAD 13,000).
For more information on septic system installation, contact Morse Engineering and Construction.