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Sinum Double | Wilo

Sinum Double

Constant pressure with continuous degassing and topping-up.

Your advantages

Constant pressure with continuous degassing and topping-up.

Wilo-Sinum is the ideal solution for pressurisation, replenishment and degassing in closed heating systems where standard equipment with a diaphragm expansion tank reaches its limits. The automatic pressure expansion system for pumps includes an integrated pressure-maintaining, degassing and replenishment function for closed heating and cooling water systems. The large variety of closed tanks sizes allows it to be adapted to many applications to ensure constant system pressures. The system offers continuous degassing with three selectable operating modes. The digital and analogue inputs allow it to be optimally integrated into existing building management systems.

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Your advantages

  • The self-learning microprocessor and large colour display with clear and intuitive menus enable easy commissioning
  • Control via various operation modes enables reliable and continuous degassing
  • Display of operating parameters and error messages provides a high degree of operational reliability
  • Advanced technology with low power consumption, long service life and easy maintenance
  • Improved convenience through volumetric controls and automatic topping-up during the heating and cooling cycles
  • Modularity enables flexible installation
  • Optional extension with automatic switching to load-sensitive or combined operation when using further systems
Series description


Pump module for pressure-maintaining station


  • Closed heating installations (acc. to EN 12828)
  • Chilled water (cooling) installations



Wilo-Sinum pump M10


Pressure expansion equipment family


Wilo centrifugal pump


Double pump module

Technical data

  • Maximum system pressure: 6, 10 and 16 bar
  • Working temperature: 3 °C / 70 °C
  • Suitable for addition of glycol-based anti-freeze up to 50%
  • In accordance with Machinery Directive 2006/42/EC

Installation and operating instructions


Article Number 2200594
Edition 2021-12
Number of pages 520
Language bg, da, de, en, es, fr, hu, no, pl, ro, ru, sv, tr
PDF (67 MB)


Article Number 4255992
Edition 2023-09
Number of pages 44
Language en
PDF (6 MB)
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