💡 The #1 cause of septic failure is solids escaping the tank and clogging the drain field soil. By adding a third chamber, you drastically reduce the risk of "carryover" solids, potentially adding decades to the life of your leach field.
| Feature | 1-Compartment | 2-Compartment | 3-Compartment | |---------|---------------|---------------|----------------| | | ~50–60% | ~70–75% | ~85–90% | | Risk of drainfield clogging | High | Medium | Low | | Required pumping frequency | Every 1–2 years | Every 2–3 years | Every 3–5 years | | Cost to install | Lowest | Moderate | Higher upfront | | Long-term drainfield life | Shortest | Medium | Longest | 3 compartment septic tank