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The Wilo-TOP-Z is a glandless circulation pump with screwed connection or flange connection. Preselectable speed stages for power adjustment

High efficiency light commercial circulator pump with 4m max head, 220 mm port-to-port length and DN40 flanged connections The Wilo Yonos MAXO range are high efficiency glandless light commercial circulator pumps designed to enable quick and simple installation. The Yonos MAXO-D pumps are twin head units.


The Wilo-Yonos MAXO can be used for the following applications:

  • Potable water circulation systems in industry and building services.
  • Manual power adjustment with 3 speed stages
  • With thermal insulation as standard
  • Simple installation due to combination flange PN 6/PN 10 (for DN 40 -DN 65)

Pump housing: Stainless steel/red brass/grey cast iron (depending on type)

Impeller: Plastic

Shaft: Stainless steel/ceramic (depending on type)

Bearing: Carbon, synthetic resin impregnated



Permissible Temperature Range
  • : TOPZ 20/4 and TOPZ 25/6 potable water up to 3.21 mmol/l (18°dH): max. +65 °C, for short periods (2 h) to +80 °C
  • : From TOP-Z 25/10 potable water up to 3.57 mmol/l (20 °dH): max.+80 °C, for short periods (2 h) to +110 °C
Mains Connection
  • : Mains Connection: 1~230 V, 50 Hz (depending on type)
  • : 3~230 V, 50 Hz (with optional switching plug)
  • : 3~400 V, 50 Hz
Protection class IP X4D
Screwed connection or flange connection (depending on type) Rp ¾ to DN 80
Max. operating pressure, standard version: 6/10 bar or 6 or 10 bar(special version: 10 bar or 16 bar)

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