Direct answer
A removable filter on the tank's outlet that catches solids before they enter the drain field. Modern Ohio installs include them; older tanks can be retrofitted. Annual cleaning is a 5-minute job that adds years of drain field life.
Authoritative sources
- US EPA SepticSmart ↗
EPA-recommended pumping schedules and inspection cadence for residential septic systems.
- Hamilton County Public Health ↗
County health department oversight of septic permits and inspections in Hamilton County, OH.
- Warren County Combined Health District ↗
Permit authority for septic installation and replacement in Warren County, OH.
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