The sludge does build up. And they should be pumped every 3 years. But most
people don't bother until something won't drain. Then they find the sludge
has crept out the outlet into the lateral field. Best to pump them at least
every 5 years. If a person were to be stupid enough to put food scraps down
a septic, i'd pump at least once a year. The grease is not being consumed
as fast as you are adding it if you put scraps down it regularly.

s


"Pete C." wrote in message
...

More urban legend. A properly sized septic system that is fed only the
human waste that is is intended to process does not need regular
pumping.