Two-phase septic tanks for water purification. They have a digestion chamber with anaerobic bacteria to degrade the materials and a clarification chamber where the wastewater is classified and oxygenated. They are manufactured in capacities of 1000 - 1500 - 2000 - 2500 and 3000 liters.
| Lts | Pers. | Ø | Height | Ref. | Article |
| 1000 | 4 | 1100 | 1100 | 21500001 | Fosa séptica estándar 2 fases 1100Ø-1000L |
| 1500 | 6 | 1100 | 1650 | 21500002 | Fosa séptica estándar 2 fases 1100Ø-1500L |
| 2000 | 8 | 1500 | 1200 | 21500003 | Fosa séptica estándar 2 fases 1500Ø-2000L |
| 2500 | 10 | 1500 | 1450 | 21500004 | Fosa séptica estándar 2 fases 1500Ø-2500L |
| 3000 | 13 | 1500 | 1750 | 21500005 | Fosa séptica estándar 2 fases 1500Ø-3000L |
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