The filter bed is an
alternative type of leaching bed. It may be used on sites where there is
insufficient area for a conventional bed or where there are natural
features such as treed areas that minimize the available leaching bed
area.
Unlike a conventional bed, (an absorption trench leaching bed in which each line of the
distribution pipe is in a separate trench) a filter bed allows the sewage
effluent to enter a series of distribution pipes that are set in a common
layer of stone. The stone layer covers a surface of filter sand overlying
the native soils.
Filter beds can be installed either in-ground, partially raised, partly
excavated or fully raised.
Class 4F
Filter Bed
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