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Wilo-Stratos PICO-Z | Wilo

Wilo-Stratos PICO-Z

Maximum hygiene and energy efficiency in domestic hot water circulation.

Your advantages
Wilo-Stratos PICO-Z

Maximum hygiene and energy efficiency in domestic hot water circulation.

The Wilo-Stratos PICO-Z is the ideal circulator for domestic hot water supply in semi-detached houses or multi-family complexes, as well as smaller buildings with a mix of residential and commercial use. With a stainless steel pump housing and the ability to detect thermal disinfection in the domestic hot water tank, it offers the greatest possible hygienic safety for the entire domestic hot water system. Thanks to the Wilo-Connector, it is quickly installed electrically and can be commissioned in factory settings with a click. The high-efficiency pump equipped with EC motor, together with the manual or temperature-controlled operating mode, offers all options for reducing individual power consumption. The large colour display, clear settings menu in combination with the Green Button Technology make the pump very convenient to operate.

Your advantages

  • Stainless steel pump housing and detection of thermal disinfection of the domestic hot water tank for maximum hygiene in the system​
  • Needs-based, energy-saving supply via temperature-controlled or manual operating mode​
  • Large colour display, clear settings menu and Green Button Technology for easy operation​
  • Simple electrical installation with the Wilo-Connector​
  • Current parameters such as temperature, flow, power consumption and consumed kilowatt hours available at a glance at all times​
  • 1-click commissioning via temperature controller as factory setting​
  • Optional: Communication using external additional modules
Series description
Wilo-Stratos PICO-Z


Glandless circulator with screwed connection, blocking-current proof EC motor and integrated electronic power control.


Domestic hot water circulation systems in the industry and building services.


Operating modes

  • T-const. for temperature-controlled mode
  • Δ p-c for constant differential pressure
  • Constant speed (n-const.)

Manual functions

  • Setting the operating mode
  • Setting of pump output (delivery head)
  • Setting the minimum temperature
  • Setting the minimum flow rate
  • Pump venting
  • Manual restart
  • Reset function for resetting the electricity meter
  • Reset function for resetting to factory settings
  • Key lock for disabling the settings

Automatic functions

  • Continuous 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 venting function
  • Automatic restart

Signal and display functions

  • Alternating display:
    • Current volume flow [m³/h]
    • Current delivery head H in [m]
    • Current speed (n) [rpm]
    • Power consumption P [W]
    • Energy consumption W [kWh]
    • Current temperature T [°C]
  • Display status for warning messages (yellow display) and error messages (red display) each with error code and description in plain text
  • Display status for process display (blue display):
    • Pump venting
    • Manual restart
  • Status LED:
    • Green LED: Proper operation
    • Blue LED: Pump communication with external module


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



Wilo-Stratos PICO-Z 20/0,5-4

Stratos PICO

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


Domestic hot water circulation


Nominal connection diameter


Nominal delivery head range [m]

Technical data

  • Fluid temperature +2 °C to +95 °C
  • Mains connection 1~230 V, 50 Hz
  • Protection class IPX4D
  • Screwed connection G1¼, G1½, G2
  • Max. operating pressure 10 bar


  • Pump housing: Stainless steel
  • Thermal insulation: Polypropylene
  • Impeller: Plastic
  • Shaft: Oxide ceramic
  • Bearing: Carbon, synthetic resin-impregnated

Scope of delivery

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


  • Screwed connections
  • Adapter fittings
  • Wilo-Connector with 2 m connection cable and shockproof plug
  • Angle plug with 2 m connection cable
  • Wilo-Smart Connect Module BT
  • Wilo-Connect module BMS

Installation and operating instructions

Wilo-Stratos PICO-Z

Article Number 4258257
Edition 2023-02
Number of pages 36
Language en
PDF (5 MB)

Wilo-Stratos PICO-Z - Quick Guide

Article Number 4252893
Edition 2022-11
Number of pages 80
Language bg, cs, da, de, el, en, es, et, fi, fr, hr, hu, it, lt, lv, nl, no, pl, pt, ro, ru, sk, sl, sr, sv, tr, uk
PDF (20 MB)


Product Flyer_Wilo-Stratos PICO-Z

Number of pages 2
Language en
PDF (2 MB)


UKCA 2215978

Number of pages 1
Language language neutral
PDF (195 KB)

UKCA 2223549

Number of pages 1
Language language neutral
PDF (197 KB)


KUK REG4 2304771

Number of pages 2
Language language neutral
PDF (176 KB)