Tagus degassing & top-up units

Series description

Your advantages

  • Efficient continuous degassing and top-up for a high fluid quality by central degassing for both system and top-up water
  • Self-regulated refilling with degassed water thanks to the turbo operation mode and the external refill contact (230V)
  • Assembled and ready for connection
  • Clear operation via the intuitive display
  • Active degassing by patented PALL-Ring technology for high-performance deaeration
  • Integrated glanded pump of the MHI series

Efficient degassing and continuous topping.

The Wilo-Tagus vac is a pressure step degasser that makes use of vacuum for an efficient degassing of closed systems. It provides an active degassing with its patented PALL ring technology combined with an automatic topping up of closed heating and cooling systems of commercial buildings. It can be easily used together with a Wilo-Sinum pressure expansion automat.


Pressure step degasser


  • Closed heating systems
  • Cooling systems

Type key


Wilo-Tagus vac 20

Tagus vac

Family name pressure step degasser


Performance class

Technical data

  • Working temperature: 3 °C to 70 °C.
  • Maximum (feed) supply temperature in the system: 120 °C.
  • Ambient temperature: > 3 °C to 45 °C.
  • Maximum pressure in the suppletion feed line: 2 to 8 bar.
  • Noise production: approx. 55 dB(A).
  • Electrical connection 230 V 50 Hz.
  • Suitable for addition of glycol-based anti-freeze up to 30%.
  • Complies with the following guidelines: Machinery Directive 2006/42/EC, PED 2014/68/EU.


Tagus degassing & top-up units


REACH regulation

Edition 2020-08
Page format 209.9 x 296.7 mm
Number of pages 4

PDF (1 MB)



PDF: Tagus degassing & top-up units


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