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Sand Filter
Description:
A sand filter is made up of a buried plastic liner filled with special sand and
gravel. After sewage passes through a septic tank, it enters a pump tank where it
is pumped to the sand filter. After flowing down through the filter, it is collected
and sent to the drainfield.
Function:
The function of the sand filter is to clean the wastewater to a high level before
passing it on to the drainfield. The coarse-sand filter creates an oxygen-rich
surface area for treatment. Microbes consume most pollution out of the water
before it flow
s into the drainfield.
Maintenance:
• Sand filters should be checked every 3 years by a certified O&M provider.
Homeowners should check the system annually.
•
If sand filter has a pump basin, clean and pump when needed.
• Make sure fl
oats swing freely and that cords are not tangled up.
•
Check observation ports for ponding water.
• Clear filter of large vegetation & ensure ports are accessible.
• Check surface of filter for soggy spots or breakouts.
• See Sections 1 & 2 for more information on protecting your tanks
IN
UNDER DRAIN
ALARM OR
CONTROL
PANEL
COARSE SAND MATERIAL
- 47 -
and filter.
ACCESS
RISER
CONTROL
FLOATS
PUMP
OUT
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