Wilo-Stratos PICO-Z

Wilo-Stratos PICO-Z Glandless circulation pump with screw connection


  • Manual and temperature-controlled mode for optimum operation
  • Boiler thermal disinfection detection
  • Indication of current consumption in watts and total energy consumption in kWh or current flow and temperature
  • Stainless steel pump housing protects against bacteria and corrosion
  • Wilo-Connector


Glandless circulation pump with threaded connection, blocking-current proof motor and integrated electronic performance control.


Potable water circulation systems for industrial and civil applications.


Modes of operation

  • Δ p-c for constant differential pressure
  • Temperature controlled mode

Manual control

  • Setting of operating modes
  • Adjustment of pump capacity (head)
  • Adjustment of minimum temperature
  • Adjustment of minimum flow rate
  • Reset" function to reset the electricity meter
  • Function "Reset" to reset to factory settings
  • Function "Hold" (Hold, Key Lock) to lock the settings

Automatic control

  • Infinitely variable speed control according to the mode of operation
  • Temperature control for maintaining a constant return temperature in the DHW circulation system
  • Standard thermal disinfection program (recognizes and maintains the thermal disinfection process of the boiler)
  • Automatic deblocking function

Signalling and indication

  • Display of the current power consumption, in W
  • Display of the total electrical energy consumption, in kWh
  • Indication of the current flow, in m3/h
  • Current temperature display, in °C
  • Fault indication (error codes)


  • Keyed casting on pump casing
  • Quick electrical connection with the Wilo-Connector
  • Blocking current proof electric motor
  • Fines filter
  • Heat insulation as standard

Model overview


Those. information

Contents of delivery

  • Pump
  • Thermal insulation
  • Wilo-Connector
  • Seals
  • Installation and operating instructions

Explanation of the name

Product designation Article number
Stratos PICO-Z 20/1-4 4216470
Stratos PICO-Z 20/1-6 4216471
Stratos PICO-Z 25/1-4 4216472
Stratos PICO-Z 25/1-6 4216473
Example: Wilo-Stratos PICO-Z 20/1-4
Stratos PICO High efficiency pump (with threaded connection) with electronic control
Z/ HWW circulation system
20/ Nominal internal connection diameter
1–4 Nominal head [m]

Technical specifications

  • Temperature of pumped drinking water up to 3.57 mmol/l (20 °dH): +2 °C to +70 °C in short-time operation (4 h): +2 °C to +75 °C
  • Connection to mains 1~230 V, 50 Hz
  • Protection class IP X4D
  • Thread connection Rp ¾ and Rp 1
  • Max. operating pressure 10 bar


  • Pump casing: Stainless steel
  • Impeller: Synthetic material
  • Shaft: Stainless steel
  • Bearings: Graphite impregnated with synthetic resin


Wilo-Stratos PICO-Z Download
Documentation Download



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