Wilo Varios Pico-STG 25/1-7-130


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Wilo-Varios PICO-STG 25/1-7-130




Wilo-Varios PICO-STG 25/1-7-130

Varios PICO

High-efficiency circulator


Compatible with heating, solar and geothermal application


Screwed connection DN 25 (Rp 1)


1 = minimum delivery head in m (adjustable down to 0.5 m)
7 = maximum delivery head in m at Q = 0 m³/h


Port-to-port length: 130 mm or 180 mm

 The most versatile replacement pump of all time.

The Wilo-Varios PICO-STG is the universal replacement solution in the heating, air conditioning and cooling sector for residential dwellings, as well as for solar and geothermal installations. It offers either standard mode or external control mode, and the settings of the pump it replaces can be easily imported using the Sync assistant. Its compact construction and the adoption of characteristic curves from the old pump with the new synchronisation function make installation and commissioning particularly easy. And with the Green Button Technology the operability is highly convenient. 

High-efficiency pump Wilo-Varios PICO-STG, electronically controlled. Maintenance-free glandless circulator with screwed connection, blocking-current proof synchronous motor according to ECM technology and built-in electronic power control for variable differential pressure control. Can be used for all heating and air-conditioning applications, as well as for solar and geothermal systems.

Standard-equipped with:

  • Preselectable control modes for optimum load adjustment:
    • Differential pressure constant (Δp-c), 3 pre-defined pump curves
    • Differential pressure variable (Δp-v), 3 pre-defined pump curves
    • Constant speed (3 speed stages)
    • External control by iPWM GT (Heating/Geothermal) or iPWM ST (Solar) signal
  • Sync function (manual programming mode) for reprogramming the pump in the event of replacement
  • Manual pump venting function for venting the rotor chamber
  • Manual restart
  • LED display
    • Display of selected control mode und pump curve
    • Status display during venting and manual restart
    • LED coding during the sync function
    • Operation and fault display
  • Integrated motor protection
  • Automatic deblocking function
  • Electrical connection cable with 3-pole plug connection and Wilo-Connector
  • PWM connection
  • Cataphoretically-coated pump housing 

Technical data

  • Fluid temperature: -20 °C to +110 °C
  • Mains connection: 1~230 V, 50 Hz
  • Protection class: IPX4D
  • Screwed connection: Rp ½, Rp 1 and Rp 1¼
  • Max. operating pressure: 10 bar
  • Rated Power P2:                             38W (depending on version)
  • Power Consumption P1 max:      50W (depending on version) 


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