Pipe and Rock Drain Field System
and rock (washed aggregate) trench system measures 36”
wide by 12” deep. separated by 2’ of soil, then
another trench of 36” wide by 12” deep. This
continues until you reach the health dept. requirements
of a given number of trench feet. On a pipe and rock (washed
aggregate) bed system the measurements are a little different.
First the width of the bed must be a number that is divisible
by 3, such as 12’-15’-18’ or 21’
or etc. The length is determined by which of the above numbers
that we use divided into the size of the required square
foot drainfield. Pipes in rows is separated every 3’
maximum in the drainfield. As an example if it is a 429
square foot drainfield and the width is 15’ then your
length is 29’.
||Pipe and Rock Septic System
Off loading the rock with remote control of the operation.
Please note our patented clamps supporting the pipe,
which assures you of the proper amount of rock in
and around the pipe. Clamps are removed and used on
the next job.
There are a number of alternative inexpensive systems
on the market today. We have learned from experience
that the Rock and Pipe septic tank system will give
a longer free operation time lowering overall costs.
These may vary by your State Health Department requirements.
In the State of Florida the above example is how we determine
the sizing of a drainfield or trench as it is laid out.
The State of Florida requires 4” corrugated HDPE
(high-density polyethylene) pipe with holes 65º up
from the bottom on each side. It is suspended in the drainfield
6” off the bottom. We use patented clamps to hold
the pipe at the proper grade level. Rock is put under the
pipe, and then 4” of rock is poured around the pipe
with 2” of rock above the pipe. Thus giving you a
bed or trench of 12” thick of rock with pipe inside.
Without a doubt truly the oldest and best system with the
longest life of any septic drainfield. Why? Because it filters
the water one last time before going into the soil.
Continuing with how the Pipe and Rock system works:
Waste water flows into the pipe from the tank,
reaching the level of the holes. When the level of water
is approximately at the 4 & 8 o’clock position
in the pipe (looking at it from an end view) it then begins
to flow out of the holes in the pipe through the rock. Water
trickles down through the rock bed and gravity then pulls
the wastewater into the soil below. As you can see there
is always a small amount of water in the corrugated pipe
with trapped bacteria in it helping to keep the bacteria
from entering the soil.
This has been proven for hundreds of years to be the best
system to filter one last time the wastewater before it
enters the soil below. If your system does not have this
feature, are you really protecting the ground water, and
the aquifer, and our environment?
A small investment you are making, for the future of our
well being and protecting our water for those who follow
behind us. Join us in this effort.