Stratos PICO-Z
Glandless pump circulator
Maximum domestic hot water hygiene and low energy consumption.
- 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




| Product description | Pump connection | Pump connection (alternative designation) | Port-to-port length L0 | Maximum operating pressure PN | Mains connection | Gross weight, approx. m | Pieces per pallet | Article number | |
|---|---|---|---|---|---|---|---|---|---|
Stratos PICO-Z 20/0,5-4 | G 1¼ | DN 20, RP 3/4 | 150 mm | 10 bar | 1~230 V, 50/60 Hz | 2 kg | 146 | 4255430 | |
Stratos PICO-Z 20/0,5-6 | G 1¼ | DN 20, RP 3/4 | 150 mm | 10 bar | 1~230 V, 50/60 Hz | 2 kg | 146 | 4255431 | |
Stratos PICO-Z 20/0,5-8 | G 1¼ | DN 20, RP 3/4 | 150 mm | 10 bar | 1~230 V, 50/60 Hz | 2.2 kg | 146 | 4255432 | |
Stratos PICO-Z 25/0,5-4 | G 1½ | RP 1, DN 25 | 180 mm | 10 bar | 1~230 V, 50/60 Hz | 2.1 kg | 146 | 4255433 | |
Stratos PICO-Z 25/0,5-6 | G 1½ | RP 1, DN 25 | 180 mm | 10 bar | 1~230 V, 50/60 Hz | 2.1 kg | 146 | 4255434 | |
Stratos PICO-Z 25/0,5-8 | G 1½ | RP 1, DN 25 | 180 mm | 10 bar | 1~230 V, 50/60 Hz | 2.3 kg | 146 | 4255435 | |
Stratos PICO-Z 30/0,5-4 | G 2 | RP 1 1/2, DN 30 | 180 mm | 10 bar | 1~230 V, 50/60 Hz | 2.2 kg | 146 | 4255436 | |
Stratos PICO-Z 30/0,5-6 | G 2 | RP 1 1/2, DN 30 | 180 mm | 10 bar | 1~230 V, 50/60 Hz | 2.2 kg | 146 | 4255437 | |
Stratos PICO-Z 30/0,5-8 | G 2 | RP 1 1/2, DN 30 | 180 mm | 10 bar | 1~230 V, 50/60 Hz | 2.4 kg | 146 | 4255438 |



Product family Wilo-Stratos PICO
Wilo always offers the right solution for variable constructional conditions and applications.
Simplify commissioning.
With the Wilo Assistant app, you can also conveniently commission pumps that are difficult to access via your smartphone.
read moreEnhance operational reliability.
The Wilo-Connect Module BMS is a practical solution for integrating the most recent Wilo-Stratos PICO generation into building automation.
read moreSimplify commissioning.
Save valuable time during commissioning with our setting assistant and the well-known Green Button Technology.
read moreEnhance operational reliability.
The Wilo-Smart Connect module BT serves as a Bluetooth interface between the Wilo-Assistant app and the pump.
read moreWe have answers to your questions
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Design
Glandless circulator with screwed connection, blocking-current proof EC motor and integrated electronic power control.Application
Domestic hot water circulation systems in building services and industry.Equipment/function
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
Equipment
- 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
Type key
Example: | Wilo-Stratos PICO-Z 20/0,5-4 |
Stratos PICO | High-efficiency pump (screw-end pump), electronically controlled |
-Z | Domestic hot water circulation |
20/ | Nominal connection diameter |
0.5-4 | Nominal delivery head range [m] |
Technical data
- Fluid temperature +2 °C to +95 °C
- Mains connection 1~230 V, 50 Hz
- IP rating IPX4D
- Screwed connection G1¼, G1½, G2
- Max. operating pressure 10 bar
Materials
- 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 for threaded connection
- Installation and operating instructions
Accessories
- 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
- Wilo-Connect module Modbus RTU







