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Wilo-Stratos ECO...-BMS


Wilo Stratos PICO-Z

Wilo-Stratos ECO-Z

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Quick Overview

Stratos ECO-Z range IS OBSOLETE now. It was replaced by New Stratos PICO-Z range.

Product Name Price Qty

Wilo-Stratos ECO-Z

Wilo-STRATOS-ECO-Z 25/1-5 num 4092513
Excl. Tax: £327.60 Incl. Tax: £393.12

Wilo-Stratos ECO-Z

Wilo-STRATOS-ECO-Z 25/1-5 BMS num 4092515
Excl. Tax: £388.50 Incl. Tax: £466.20

Availability: In stock


Wilo-Stratos ECO-Z

Glandless circulating pump with screwed connection and automatic power adjustment


Secondary hot water circulation systems and similar systems in industrial and building services

Type key

Example: Wilo-Stratos ECO-Z 25/1-5
Stratos ECO High-efficiency pump (screw-end pump), electronically controlled
‐Z Secondary hot water circulation
25/ Nominal connection diameter
1-5 Nominal delivery head range [m]

Special features/product advantages

  • Corrosion-resistant pump housing made of red brass for systems where oxygen entry is possible
  • Optimum handling due to front operation, variable installation positions
  • Automatic setback operation
  • Automatic adjustment of the pump output in secondary hot water circulation systems with variable volume flow
  • Very high starting torque for reliable starting
  • All plastic parts that come into contact with the fluid fulfil KTW recommendations
  • Min. electrical power consumption: only 5.8 W

Technical data

  • Fluid temperature up to 3.57 mmol/l (20 °dH):
    • +15 °C to +65 °C
    • in short-term operation (2 hours): +15 °C to +70 °C
  • Mains connection 1~230 V, 50 Hz
  • Protection class IP 44
  • Threaded connection Rp 1
  • Max. operating pressure 10 bar


Operating modes

  • Manual control mode (n=constant) (only Stratos ECO‐Z...‐BMS)
  • Δp-c for constant differential pressure (only Stratos ECO-Z...BMS)
  • Δp-v for variable differential pressure

Manual functions

  • Operating mode setting (only Stratos ECO-Z...BMS)
  • Differential-pressure setpoint setting
  • Setting automatic setback operation
  • Pump ON/OFF setting (only Stratos ECO-Z...BMS)
  • Speed setting (manual control mode) (only Stratos ECO‐Z...‐BMS)

Automatic functions

  • Stageless power adjustment depending on the operating mode
  • Automatic setback operation
  • Deblocking function
  • Soft start
  • Safety control

External control functions

  • "Overriding Off" control input (only Stratos ECO-Z...BMS)
  • "Analogue In 0 ‐ 10 V" control input (remote speed adjustment) (only Stratos ECO‐Z...‐BMS)
  • "Analogue In 0 ‐ 10 V" control input (remote setpoint adjustment) (only Stratos ECO‐Z...‐BMS)


Signal and display functions
  • Collective fault signal (potential-free NC contact) (only Stratos ECO-Z...-BMS)
  • Fault signal light (only Stratos ECO-Z...-BMS)


  • Wrench attachment point on pump body
  • Cable lead-in possible on both sides
  • Quick connection with spring clips
  • Blocking current-proof motor
  • Thermal insulation as standard


  • Pump housing: Red brass (CC 499K) according to DIN EN 1982 and according to TrinkwV 2001 (drinking water ordinance)
  • Impeller: Polypropylene
  • Shaft: Stainless steel
  • Bearing: Carbon, synthetic resin impregnated

Scope of delivery

  • Pump
  • Thermal insulation
  • Seals
  • Installation and operating instructions


  • Version ...-BMS suitable for connection to external monitoring units (e.g. building automation (BA) or DDC installations). The Stratos ECO-Z BMS version has as standard a collective fault signal, the "External OFF" function as well as the "0-10 V" control input.


  • Screwed connections
  • Adapter fittings

Download Wilo-Stratos-ECO Installation and operating instructions pdf

Additional Information

SKU Wilo-Stratos ECO-Z
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