Septic Lines
Leach lines are trenches that are filled with washed rock/gravel to flow level. Perforated pipe lays on top of the rock at a level grade. More rock is added to cover the pipe, and paper or other approved filter material is used to keep soil from filtering down into the rock.
n a conventional "drain field" of perforated pipes buried in gravel-filled trenches, a drain line may be invaded by tree roots. This is why experts advise keeping tree and shrub plantings away from drain fields.
Vehicle traffic can also collapse this or any outdoor waste piping, which is why experts advise against ever driving over a drainfield or over any other septic system components.
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