| Answer | Crossword Clue |
|---|---|
| SEPTIC | Type of tank or system |
| SEPTIC | Tank or system |
| PENAL | Type of "colony" or "system" |
| MERIT | Type of system or badge |
| SOLAR | Type of system or battery |
| PENAL | Type of colony or system |
| ECO | System or type starter |
| ECO | Prefix with system or type |
| ECO | Prefix for system or type |
