A stack septic system is an alternative to conventional septic systems when poor soil conditions or high water tables are present. It requires more maintenance and can be more expensive, but can be landscaped and add visual interest to a garden.
A stack septic system is a type of alternative septic system that is used when site conditions do not allow for the installation of a conventional septic system. Because designing and installing septic systems can be a complicated task, it’s wise to let a professional build a mound septic system, to ensure no problems develop in the future. People should also be aware that this type of system requires more care and maintenance than conventional systems and can be more expensive to install.
There are several reasons why a conventional septic system won’t work on a site. One of the most common is poor soil conditions, such as very rocky terrain. Another problem can be a high water table, which could cause the septic system to back up or could lead to contamination of the water table with effluent. Under these conditions, a normal septic leach field should not be installed, so a mound septic system may be recommended.
With a mound septic system, the effluent from the house is routed into an underground septic tank, as with a normal septic system, with the solids settling to the bottom and the fluids floating to the top. The fluids are in turn pumped into a secondary tank, which activates a pump to force the fluid into the mound when it rises above a certain level. As with a normal septic system, the tank will need to be cleaned periodically, and maintenance may also need to be performed on the pump used to pressurize the effluent.
The mound is built above grade by layering sand and earth. Acts effectively as a filter for septic tank leached effluent, just like a conventional leach field. There are a few issues with installing a mound septic system that need to be considered. It is important to use the right type of materials to fill the mound and to place the mound in an area with low traffic, because high traffic can compact the soils and make the mound less effective.
Since most people don’t want a large mound of dirt in their backyard, landscaping a mound septic system is common. The mound can actually add texture and visual interest to a garden, and rather than being seen as an obstacle to overcome, the mound should be thought of as a dynamic addition to the garden. It is unsafe to plant trees and shrubs on the mound, as their roots can interfere with the function of the mound, but grasses and plants are fine.
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