The tank
Solids settle and scum floats. The tank needs enough working volume and should not be treated as a garbage can.
Distribution
Gravity, pumps, chambers or distribution boxes may move effluent toward the dispersal area depending on the system.
The dispersal area
Soil and loading matter. The field needs protection from compaction, excess water and construction.
Advanced treatment
Some systems use treatment units, pumps or alarms and have maintenance requirements beyond periodic tank service.
Property-specific rule: septic approvals, filings, permits and qualified-person requirements differ across Canada. Use the province and city-area guides to reach the correct official starting point.
Before you act
Keep the system location, approval records and service history together. For purchases, failures or renovations, use a qualified onsite professional appropriate to your province and the scope of work.