This thread got me to thinking about my septic, so we had it pumped after 8.5 years a few weeks ago. Everything looked good, no issues, BUT the pumper said I had a strange looking tank design..
Our tank was 1500 but but it was two compartments, the interior wall separating the two tank was solid EXCEPT for maybe a 1/4" to 1/2" horizontal opening about half was down. This set up pretty much only let the effluent water get into the outlet side of the tank. There was no fats, very little solids on the bottom of the tank on the outlet side.
I wanted to add an effluent filter to the outlet drain, but this tank design basically has one built in.
Looking at diagrams/pics of septic tanks I havent seen a design like this. The pumper said he has only seen it a few times in commercial set up..
it cost $365 ($325 for pumping, $40 for having to uncover the two accesses in both sides of the tank)..
thanks for the reminder
Brian