Floating and removable material is extracted from domestic wastewater in mechanical septic tanks. This is pure mechanical cleaning, for which you need 200 litres per person, per day of settling volume plus 80 litres person per year of sludge and scum storage based on AS/NZS1547.
The following items are included:
| Total volume (I) | Length (mm) | Width (mm) | Height (mm) | Weight (Kg) | |
| 5 Inh., 2,700 l | 2700 | 2080 | 1565 | 2010 | 145 |
| 7 Inh., 3,750 l | 3750 | 2280 | 1755 | 2200 | 175 |
| 9 Inh., 4,800 l | 4800 | 2280 | 1985 | 2430 | 220 |
| 13 Inh., 6,500 l | 6500 | 2390 | 2190 | 2710 | 260 |