It was a Presby Environmental raised bed sand system. This is a more cost effective and environmentally friendly septic system than standard raised bed sand systems. Raised bed systems are only necessary when the natural soil has a poor percolation rate.Click to see full answer. Furthermore, how much does a Presby septic system cost? Septic Tank System Cost National Average Cost $3,918 Minimum Cost $1,500 Maximum Cost $15,000 Average Range $3,280 to $5,040 Furthermore, how are septic tanks vented? The first way your septic system is ventilated is through the inlet and outlet pipes. The inlet pipe allows waste to flow from your house into the septic tank and the outlet pipe allows it to flow from the tank to the drainage field. These pipes, when clear, should allow gases to flow out into the drainage field. Also asked, what kind of septic system do I have? Conventional Systems. Generally there are two types of conventional septic systems: those that use gravel in the drainfield and those that use some form of chamber system. As its name suggests the older style gravelled system contains a layer of gravel in the drainfield.What is an advanced septic system?Advanced Treatment Units (ATUs), referred here to as an individual residential system, are small biological treatment systems used to treat wastewater to a higher degree than a traditional septic system.

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