Conventional septic systems are not entirely care free. The
undigested solids (sludge) in the bottom of the septic tank
should be pumped out every two to four years, depending on usage
and tank size. If the sludge is not removed periodically, it
will eventually carry over into the drainfield and cause the
field to fail.
A well designed system can handle a reasonable amount of
normal household chemicals such as drain cleaners, laundry
detergent and bleach; excessive usage can be detrimental. You
should avoid putting in chemicals that are toxic to the
bacteria, such as paint thinner, solvents, insecticides, etc.
Cooking fats and grease should also be avoided. If a garbage
disposal is used, more frequent tank pumping may be needed.
Depending on the size of the tank and your location, plan on
a cost of about $200 each time the tank is pumped. When the tank
is pumped, your service person should also check the tank
baffles for possible damage; ask them to do this inspection
before you contract with them. While the tank is open, the
service technician can also run some water from a hose into the
distribution box to get an indication that the drainfield is
also still functioning; ask if the company offers this service.
fax (425) 432-4461