It is recommended to install an accumulator tank in pressurized water systems. The storage tank is pressurized to 0.8 bar, and provides a more even flow for small volumes, as the pump does not need to start up.
| Pos.no. | Part no. | Connection | Volume, liter | Height | Diameter | Weight | Pressure |
| QL.189 | 41103045 | 1/2" | 2 l | 315 mm | 160 mm | 1.2 kg | 0.8 Bar |
| QL.190 | 41103046 | 3/4" | 2 l | 315 mm | 160 mm | 1.2 kg | 0.8 Bar |