Wilo Stratos PICO-Z 20/1-6


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Stratos PICO-Z 20/1-6

P/N 4216471



Wilo-Stratos PICO-Z 20/1-4

Stratos PICO

High-efficiency pump (screw-end pump), electronically controlled


domestic hot water circulation


Nominal connection diameter


Nominal delivery head range [m]


This circulation pump is suitable only for drinking water.

Maintenance-free domestic hot water glandless circulation pump with threaded connection, blocking-current proof synchronous motor according to ECM technology and built-in electronic power control for variable differential pressure control. With maximum efficiencies and high starting torque, including automatic deblocking function. Can be used for all domestic hot water applications (+2 up to +70 °C).

Standard-equipped with:

  • Preselectable control modes for optimum manual operating mode, Δp-c (differential pressure constant)
  • Temperature-controlled operating mode
  • Identification of the thermal disinfection of the domestic hot water tank
  • Integrated motor protection
  • Operating and fault display (with error codes)
  • Display of the current consumption in watts and the cumulative kilowatt hours, or
  • Display of effective flow and temperature
  • Reset function for resetting the electricity meter or for resetting the settings to the factory settings
  • "Hold" function (key lock) for disabling the settings
  • Minimal consumption only 3 W
  • Automatic deblocking function
  • Equipped as standard with a thermal insulation shell 

Technical data

  • Fluid temperature of drinking water up to 3.57 mmol/l (20 °dH): +2 °C to +70 °C in short-time duty (4 h): +2 °C to +75 °C
  • Mains connection 1~230 V, 50 Hz
  • Protection class IP X4D
  • Threaded connection Rp ¾ and Rp 1
  • Max. operating pressure: 10 bar
  • Rated Power P2: 30W (depending on version)
  • Power consumption P1 max:      45W (depending on version)


  • Pump housing: Stainless steel
  • Impeller: Plastic
  • Shaft: Stainless steel
  • Bearing: Carbon, synthetic resin-impregnated 

Operating modes

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

Manual functions

  • Setting the operating mode
  • Setting of pump output (delivery head)
  • Setting the minimum temperature
  • Setting of the minimum flow
  • Reset function for resetting the electricity meter
  • Reset function for resetting to factory settings
  • "Hold" function (key lock) for disabling the settings

Automatic functions

  • Infinitely variable power adjustment according to the operating mode
  • Temperature control for maintaining a constant return temperature in the domestic hot water circulation system
  • Thermal disinfection routine (detecting and supporting the thermal disinfection of the domestic hot water storage tank)
  • Automatic deblocking function

Signal and display functions

  • Display of the current power consumption in W
  • Display of the cumulative kilowatt hours in kWh
  • Display of effective flow in m3/h
  • Display of the current temperature in °C
  • Indication of fault signals (error codes)


  • Wrench attachment point on pump body
  • Quick electrical connection with Wilo-Connector
  • Blocking-current proof motor
  • Particle filter
  • Thermal insulation as standard