The most versatile replacement pump to date.

The Wilo-Varios PICO-STG is a universal replacement solution for heating, air conditioning, and cooling applications in single- and two-family homes. It is suitable for use in pipe groups, heating boilers, as well as solar and geothermal systems. The unit offers quick commissioning, three-stage power adjustment, and the ability to adopt the performance curve of an old pump via the Sync Assistant.

Features/Product Advantages

Universal application for heating, air conditioning, cooling, solar, and geothermal systems
Compact design with Wilo-Connector and Molex connection for easy installation
Quick commissioning with 3-stage power adjustment for radiators and underfloor heating, plus a constant speed option
iPWM control function suitable for heating boilers, solar, and geothermal applications
Performance curves from old pumps can be transferred via the Sync Assistant, allowing for optional custom adjustments
Self-protection routines (e.g., dry-running protection) ensure reliable operation
Supports automatic and manual restart or pump venting functions, enhancing ease of maintenance and operational reliability

Eco-friendly attributes

High-efficiency pump with automatic power adjustment (Energy Efficiency Index ≤ 0.20)
Sustainable and carbon-neutral production and processes at our European plants

Construction

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

Applications

Primary circulation in all domestic hot water heating systems, air conditioning applications, industrial circulation systems, and solar and geothermal installations.

Equipment/Functions

Operating modes

Constant differential pressure (3 predefined characteristic curves)
Variable differential pressure (3 predefined characteristic curves)
Constant speed (3 speed stages)
External control via iPWM signal
iPWM GT (heating/geothermal; not available on Varios PICO-STG .../1-13)
iPWM ST (solar thermal)

Manual functions

Operating mode setting based on application
Pump power setting (characteristic curve)
Constant speed setting
Sync function activation and LED coding
Pump venting function
Manual restart

Automatic functions

Automatic restart

Reporting and display functions

Display of selected control mode
Display of selected characteristic curve within the control mode or iPWM type
Display of active sync function and LED coding
Status display for manual restart or pump venting function
Operation and fault display

Equipment

Electrophoretically coated pump housing
Wrench attachment points on pump housing
Power supply cable with 3-core pump plug and Wilo-Connector
iPWM interface
Pump venting function
Manual restart
Blocking-current proof motor
Particle filter

Technical data

Fluid temperature: -20 °C to +110 °C
Mains connection: 1~230 V, 50 Hz
Protection class: IPX4D
Threaded connections: G1, G1½, G2
Max. operating pressure: 10 bar

Materials

Pump housing: Grey cast iron (EN-GJL-200)
Impeller: Plastic (PP - 40% GF)
Pump shaft: Stainless steel
Bearing: Carbon, metal-impregnated

Scope of delivery

Pump
Power supply cable with 3-core pump plug and Wilo-Connector
Wilo-Connector
Gaskets for threaded connections
Installation and operating instructions

Options

Varios PICO-STG ...-130: Short installation length of 130 mm

Accessories

Threaded connections
Adapter fittings
Thermal insulation
iPWM Signal cable
Wilo connector with 2 m connecting cable and plug with protective earth contact
Angled plug with 2 m connecting cable