Series description

Your advantages

  • Direction of rotation signal lamp for displaying the correct sense of rotation (only with 3~)
  • With thermal insulation as standard


Glandless circulator with screwed connection or flange connection. Pre-selectable speed stages for power adjustment


Domestic hot water circulation systems in industry and building services.


Operating modes

  • Speed-stage switching

Manual functions

  • Setting the speed stages: 3 speed stages

Automatic functions

  • Internal protection against unacceptably high winding temperatures (only for pumps with P2 < 180 W, optional for all types with switchgears SK 602N and SK 622N).

Signal and display functions

  • Thermal winding contact (WSK, potential-free NC contact) (only for pumps with P2 ≥ 180 W)
  • Direction of rotation signal lamp (only for 3~ pumps)


  • For flange-end pumps: Flange versions
    • Standard version for DN 40 to DN 65 pumps: PN 6/10 combination flange (PN 16 flange according to EN 1092-2) for PN 6 and PN 16 counter flanges,
    • Standard version for pumps DN 80: PN 6 flange (designed for PN 16 according to EN 1092-2) for PN 6 counter flange
    • Special version for DN 40 to DN 80 pumps: PN 16 flange (according to EN 1092-2) for PN 16 counter flange,
  • Cable inlet possible from both sides (only for 1~pumps and 3~pumps with P2≥180 W)
  • Thermal insulation as standard

Scope of delivery

  • Pump
  • Thermal insulation
  • Gaskets for threaded connection
  • Washers for flange screws (for nominal connection diameters DN 40 - DN 65)
  • Installation and operating instructions

Type key


Wilo-TOP-Z 40/7


Standard pump (screw-end pump or flange-end pump)


Single pump for domestic hot water circulation


Nominal connection diameter


Nominal delivery head range [m] at Q = 0 m3/h

Technical data

  • Permissible temperature range
    • TOP-Z 20/4 and TOP-Z 25/6 drinking water up to 3.21 mmol/l (18 °dH): max. +65 °C, in short-term operation (2 h) up to +80 °C
    • from TOP-Z 25/10 drinking water up to 3.57 mmol/l (20 °dH): max. +80 °C, in short-term operation (2 h) up to +110 °C
  • 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 of standard version: 6/10 bar or 6 bar (special version: 10 bar or 16 bar)


  • 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

Duty chart



REACH regulation

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

PDF (1 MB)


General overview 2020 International version

Edition 2020
Version number 1
Page format 209.9 x 297.0 mm
Number of pages 78

PDF (48 MB)



Article Number 2132728
Edition 2013-02
Version number 01
Page format A4
Number of pages 28

PDF (2 MB)





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