| septic tank → MadeOf → concrete | 0.70 | |
| septic tank → MadeOf → polyethylene | 0.65 | |
| septic tank → MadeOf → fiberglas | 0.64 | |
| septic tank → MadeOf → plastic | 0.58 | |
| septic tank → MadeOf → fiberglass | 0.57 | |
| septic tank → MadeOf → steel | 0.49 | |
| septic tank → MadeOf → different materials | 0.41 | |
| septic tank → MadeOf → pvc | 0.30 | |
| septic tank → MadeOf → special long-lasting polymer pl… | 0.09 |