The Septic Doctor - Myth No.6: effluent filters are not necessary. Why should I spend the money when my parents never had one on their tank and it still works fine.
Sanitary Tee and Filter Statesville, NC | Lentz Wastewater
Do You Need a Septic Tank Filter? | The Original Plumber & Septic
Septic System Types - Ever Green Septic Design
Septic Tank Effluent Filter | Sim/Tech STF-110 Gravity Flow