The purification and cleaning of the wastewater is accomplished through a biofilm present in perforated drain tiles.
RAISING THE PIPE IN THE OVERFLOW AT FIELDLINES INSTALL
It’s quite possible that the percolation test will come back saying that your soil isn’t of the right drainage quality to have an underground septic system, in which case you’ll have to install an above-ground septic system at two to three times the cost.Īn engineered mound system is required when the soil type on the homeowner’s property is either too permeable or completely impermeable, or if there is only a shallow cover of soil over porous bedrock, or a high seasonal water table present. The average cost for an above-ground mound septic system is $15,000, with annual maintenance costing as much as $500. Anaerobic or gravity systems flow into a drain field while aerobic systems treat the effluent before it reaches the drain field with oxygen, biofilm in the drain tiles, or sand filters. The main difference between aerobic and anaerobic septic systems are in how they treat the effluent. Additional benefits include needing a drain field half the size of that of a conventional system, which allows for more placement options on your property. The wastewater released is cleaner than that produced by conventional systems and can be used for above-ground irrigation needs after it's sterilized. The aerobic system breaks down the solids in the tank using oxygen, which is accomplished using a motor and a timer. Aerobic Septic System CostĪerobic septic systems generally cost $10,500 to $15,000 on average. These are generally the quickest, easiest, and cheapest to install, and the effluent travels through the septic tank and on into the drain field using gravity. Septic System Types And Cost Septic System TypeĬonventional or Anaerobic Septic System CostĪn anaerobic or conventional septic system costs $3,500 to install on average with most homeowners paying between $2,500 and $5,000. An alternative or aerobic septic system typically costs between $10,500 to $15,000 on average, whereas a conventional or anaerobic system ranges from $2,500 to $5,000 with most homeowners paying $3,500 on average. There are two main types of septic systems, conventional and alternative, with those two categories breaking down further according to how the system manages waste. Return to Top New Septic System Installation Costs The cost for a 1,250-gallon septic tank to support up to 4-bedrooms is between $2,310 and $5,400 with most homeowners spending $3,530 on average. Cost of Septic System for 4-Bedroom House The cost for a 1,000-gallon septic tank to support up to 3-bedrooms is between $2,190 and $5,200 with most homeowners spending $3,250 on average. Add the cost of percolation testing, laying about 40 feet of pipes, and building the drain field ( $2,000 – $10,000) to get your final cost.Ĭost of Septic System for 3-Bedroom House Septic Tank Sizes and Prices Tank MaterialĬosts above include excavation with good site conditions, placing of the tank, inlet and outlet fittings, and backfill after hookup. Standard septic tank sizes usually start at 750 gallons for a one- to two-bedroom houses under 1,500 sqft, and go up to 1,500 gallons for a six-bedroom house that is less than 5,500 sqft. The size of the tank needed for your home depends on the home’s size in square feet and the number of bedrooms. Septic Tank Cost By House and Gallon Size Septic System Installation Cost Septic System Type For an engineered system, the costs will average around $15,000 for installation. For conventional systems, prices start around $5,000 in the Midwest, whereas in coastal areas, one could cost $10,000 or more. Table Of ContentsĪ traditional septic tank for a 3-bedroom house will cost around $3,900 to install on average. When building a home on raw land that is not connected to a local municipality waste system, this type of system is your best option for sewage treatment.
Your final cost depends on the conditions of current waste lines and the soil where the septic tank will go. Septic system installation with two alternating pumps costs $9,571 on average and can go up to $15,000. Most homeowners spend between $3,280 and $5,040 for a 1,250-gallon system that supports 3 or 4 bedrooms. A new septic tank system costs $3,918 to install on average, with prices ranging from $1,500 to upward of $5,000.
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