Ether Jones wrote:

udarrell wrote:

Our rather modern septic system has a filter in the tank that ought to
be taken out every 4 month or so, and sprayed clean with a water hose.
Then reinstall it.

Right. How many homeowners do you think actually do THAT ?

All the homeowners that have such systems *and* happen to work for
septic service companies so they actually understand them.

Pete C.