Catalogue creation
My favorites
Tagus Degassing & Top-Up Units | Wilo

Tagus Degassing & Top-Up Units

Efficient degassing and continuous topping.

Your advantages
Wilo-Tagus vac 20

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.

Recommended services

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
Series description




  • Heating systems
  • Cold Water systems



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.


Installation and operating instructions

Wilo-Tagus Vac

Article Number 20180809
Edition 2021-12
Page format 148.5 x 209.9 mm
Number of pages 346
PDF (31 MB)

Certificate REACH

REACH Regulation

Edition 2021-05
Page format 209.9 x 297.0 mm
Number of pages 4
PDF (212 KB)