SEWERAGE
Next: how to dig a septic soakaway
T
he drain field of a
standard septic system
is also called a leach
field or soak away and is
incorrectly called a French
drain, if you wish to be
pedantic.
There are many designs of
drain field, the most common
being a large pit filled with
broken brick, rocks or even
old tyres, and covered with
old corrugated iron and a
layer of soil. There are a
number of reasons why this is
neither the most efficient
design, nor the safest.
A proper drain field comprises a long and narrow
trench, the key being not the
size of the hole but the
surface area of the walls and
floor