Wilo Yonos PICO 25/1-5 130 High-Efficiency Glandless Heating Circulator Pump
The Wilo Yonos PICO 25/1-5 130 is a high-efficiency glandless circulator (article number 4215522) for sealed central heating, underfloor and air-conditioning systems in single- and small two-family homes. Its electronically commutated ECM synchronous motor draws as little as 4 W at minimum load, with an Energy Efficiency Index EEI ≤ 0.20 — the benchmark for the most efficient circulators on the market.
The green operating button selects Δp-c (constant), Δp-v (variable) differential pressure or three fixed-speed curves; the front LED display shows setpoint, live watts and fault codes. With 5 m max head, 1½" BSP unions and 130 mm port-to-port length, it is a direct, energy-efficient swap for older fixed-speed pumps.
Δp-v
An electronically commutated synchronous motor with built-in frequency converter delivers EEI ≤ 0.20 and a fraction of the energy use of older fixed-speed pumps.
In Δp-v mode the pump automatically reduces head as TRVs close down — ideal for radiator circuits where load changes constantly through the day.
Δp-c mode keeps head steady across changing flow — the right choice for UFH manifolds with thermal actuators that switch zones on and off.
The single front LED window doubles as setpoint adjustment and live readout, showing the chosen mode, head in metres and live power consumption in watts.
If the rotor sticks after a long shutdown, an automatic deblocking routine attempts to free it before raising a fault — preventing avoidable callouts on seasonal first-fire.
Grey cast-iron pump body rated to 10 bar with a PP-GF40 impeller, stainless-steel shaft and metal-impregnated carbon bearings.
| Manufacturer / brand | Wilo |
| Model | Yonos PICO 25/1-5 130 |
| Article number (MPN) | 4215522 |
| Pump type | Glandless wet-rotor circulator with ECM motor |
| Max. delivery head | 5 m |
| Max. flow rate (Q max.) | Approx. 2.7 m³/h |
| Energy Efficiency Index (EEI) | ≤ 0.20 |
| Power consumption P1 | 4 – 33 W |
| Mains connection | 1~230 V AC, 50/60 Hz |
| Speed range | 800 – 4,200 rpm |
| Control modes | Δp-c, Δp-v, 3 fixed-speed curves |
| Threaded pipe union | Rp 1" (G 1½ thread) |
| Port-to-port length | 130 mm |
| Max. operating pressure | 10 bar (PN10) |
| Fluid temperature range | −10 °C to +110 °C (95 °C at 40 °C ambient) |
| Min. inlet head at 50 / 95 / 110 °C | 0.5 / 3 / 10 m |
| Pump housing | Grey cast iron (EN-GJL-200) |
| Impeller / shaft / bearings | PP-GF40 / stainless steel / carbon |
| Protection class | IPX2D |
| Insulation class | F |
| Weight (net) | Approx. 2.0 kg |
| Conformity | ErP 2015 / EU 641/2009; EN 61800-3 EMC |
Is the 25/1-5 the right size for my home?
Sized for smaller systems — typically a single-family home with a modest radiator or UFH load and short pipe runs. If your existing pump runs on speed 1 or 2 of a 3-speed unit, the 25/1-5 will almost certainly cover the duty. Larger or multi-zone systems generally need the 25/1-6 (6 m head) or 25/1-8 (8 m head).
Will it replace my Wilo Star-RS or Grundfos UPS 25/50?
Yes — the 130 mm port-to-port length and 1½" BSP unions are the industry-standard footprint shared by the Star-RS, UPS, UPS2 and Alpha 2 ranges. Existing union nuts usually transfer over without pipework changes.
Which control mode should I select?
Δp-v for radiator circuits with TRVs; Δp-c for underfloor heating manifolds with thermal actuators. The three fixed-speed curves replicate traditional 3-speed pump behaviour if a boiler manufacturer specifies a fixed setting.
How much energy will it save?
Compared with a typical older 3-speed pump averaging 60–90 W, the Yonos PICO range typically runs at 5–25 W in normal heating operation — in the order of £40–£80 per UK heating season in electricity savings, depending on tariff and runtime.
Original: $175.46
-65%$175.46
$61.41Wilo Yonos PICO 25/1-5 130 High-Efficiency Glandless Heating Circulator Pump
The Wilo Yonos PICO 25/1-5 130 is a high-efficiency glandless circulator (article number 4215522) for sealed central heating, underfloor and air-conditioning systems in single- and small two-family homes. Its electronically commutated ECM synchronous motor draws as little as 4 W at minimum load, with an Energy Efficiency Index EEI ≤ 0.20 — the benchmark for the most efficient circulators on the market.
The green operating button selects Δp-c (constant), Δp-v (variable) differential pressure or three fixed-speed curves; the front LED display shows setpoint, live watts and fault codes. With 5 m max head, 1½" BSP unions and 130 mm port-to-port length, it is a direct, energy-efficient swap for older fixed-speed pumps.
Δp-v
An electronically commutated synchronous motor with built-in frequency converter delivers EEI ≤ 0.20 and a fraction of the energy use of older fixed-speed pumps.
In Δp-v mode the pump automatically reduces head as TRVs close down — ideal for radiator circuits where load changes constantly through the day.
Δp-c mode keeps head steady across changing flow — the right choice for UFH manifolds with thermal actuators that switch zones on and off.
The single front LED window doubles as setpoint adjustment and live readout, showing the chosen mode, head in metres and live power consumption in watts.
If the rotor sticks after a long shutdown, an automatic deblocking routine attempts to free it before raising a fault — preventing avoidable callouts on seasonal first-fire.
Grey cast-iron pump body rated to 10 bar with a PP-GF40 impeller, stainless-steel shaft and metal-impregnated carbon bearings.
| Manufacturer / brand | Wilo |
| Model | Yonos PICO 25/1-5 130 |
| Article number (MPN) | 4215522 |
| Pump type | Glandless wet-rotor circulator with ECM motor |
| Max. delivery head | 5 m |
| Max. flow rate (Q max.) | Approx. 2.7 m³/h |
| Energy Efficiency Index (EEI) | ≤ 0.20 |
| Power consumption P1 | 4 – 33 W |
| Mains connection | 1~230 V AC, 50/60 Hz |
| Speed range | 800 – 4,200 rpm |
| Control modes | Δp-c, Δp-v, 3 fixed-speed curves |
| Threaded pipe union | Rp 1" (G 1½ thread) |
| Port-to-port length | 130 mm |
| Max. operating pressure | 10 bar (PN10) |
| Fluid temperature range | −10 °C to +110 °C (95 °C at 40 °C ambient) |
| Min. inlet head at 50 / 95 / 110 °C | 0.5 / 3 / 10 m |
| Pump housing | Grey cast iron (EN-GJL-200) |
| Impeller / shaft / bearings | PP-GF40 / stainless steel / carbon |
| Protection class | IPX2D |
| Insulation class | F |
| Weight (net) | Approx. 2.0 kg |
| Conformity | ErP 2015 / EU 641/2009; EN 61800-3 EMC |
Is the 25/1-5 the right size for my home?
Sized for smaller systems — typically a single-family home with a modest radiator or UFH load and short pipe runs. If your existing pump runs on speed 1 or 2 of a 3-speed unit, the 25/1-5 will almost certainly cover the duty. Larger or multi-zone systems generally need the 25/1-6 (6 m head) or 25/1-8 (8 m head).
Will it replace my Wilo Star-RS or Grundfos UPS 25/50?
Yes — the 130 mm port-to-port length and 1½" BSP unions are the industry-standard footprint shared by the Star-RS, UPS, UPS2 and Alpha 2 ranges. Existing union nuts usually transfer over without pipework changes.
Which control mode should I select?
Δp-v for radiator circuits with TRVs; Δp-c for underfloor heating manifolds with thermal actuators. The three fixed-speed curves replicate traditional 3-speed pump behaviour if a boiler manufacturer specifies a fixed setting.
How much energy will it save?
Compared with a typical older 3-speed pump averaging 60–90 W, the Yonos PICO range typically runs at 5–25 W in normal heating operation — in the order of £40–£80 per UK heating season in electricity savings, depending on tariff and runtime.
Product Information
Product Information
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Description
The Wilo Yonos PICO 25/1-5 130 is a high-efficiency glandless circulator (article number 4215522) for sealed central heating, underfloor and air-conditioning systems in single- and small two-family homes. Its electronically commutated ECM synchronous motor draws as little as 4 W at minimum load, with an Energy Efficiency Index EEI ≤ 0.20 — the benchmark for the most efficient circulators on the market.
The green operating button selects Δp-c (constant), Δp-v (variable) differential pressure or three fixed-speed curves; the front LED display shows setpoint, live watts and fault codes. With 5 m max head, 1½" BSP unions and 130 mm port-to-port length, it is a direct, energy-efficient swap for older fixed-speed pumps.
Δp-v
An electronically commutated synchronous motor with built-in frequency converter delivers EEI ≤ 0.20 and a fraction of the energy use of older fixed-speed pumps.
In Δp-v mode the pump automatically reduces head as TRVs close down — ideal for radiator circuits where load changes constantly through the day.
Δp-c mode keeps head steady across changing flow — the right choice for UFH manifolds with thermal actuators that switch zones on and off.
The single front LED window doubles as setpoint adjustment and live readout, showing the chosen mode, head in metres and live power consumption in watts.
If the rotor sticks after a long shutdown, an automatic deblocking routine attempts to free it before raising a fault — preventing avoidable callouts on seasonal first-fire.
Grey cast-iron pump body rated to 10 bar with a PP-GF40 impeller, stainless-steel shaft and metal-impregnated carbon bearings.
| Manufacturer / brand | Wilo |
| Model | Yonos PICO 25/1-5 130 |
| Article number (MPN) | 4215522 |
| Pump type | Glandless wet-rotor circulator with ECM motor |
| Max. delivery head | 5 m |
| Max. flow rate (Q max.) | Approx. 2.7 m³/h |
| Energy Efficiency Index (EEI) | ≤ 0.20 |
| Power consumption P1 | 4 – 33 W |
| Mains connection | 1~230 V AC, 50/60 Hz |
| Speed range | 800 – 4,200 rpm |
| Control modes | Δp-c, Δp-v, 3 fixed-speed curves |
| Threaded pipe union | Rp 1" (G 1½ thread) |
| Port-to-port length | 130 mm |
| Max. operating pressure | 10 bar (PN10) |
| Fluid temperature range | −10 °C to +110 °C (95 °C at 40 °C ambient) |
| Min. inlet head at 50 / 95 / 110 °C | 0.5 / 3 / 10 m |
| Pump housing | Grey cast iron (EN-GJL-200) |
| Impeller / shaft / bearings | PP-GF40 / stainless steel / carbon |
| Protection class | IPX2D |
| Insulation class | F |
| Weight (net) | Approx. 2.0 kg |
| Conformity | ErP 2015 / EU 641/2009; EN 61800-3 EMC |
Is the 25/1-5 the right size for my home?
Sized for smaller systems — typically a single-family home with a modest radiator or UFH load and short pipe runs. If your existing pump runs on speed 1 or 2 of a 3-speed unit, the 25/1-5 will almost certainly cover the duty. Larger or multi-zone systems generally need the 25/1-6 (6 m head) or 25/1-8 (8 m head).
Will it replace my Wilo Star-RS or Grundfos UPS 25/50?
Yes — the 130 mm port-to-port length and 1½" BSP unions are the industry-standard footprint shared by the Star-RS, UPS, UPS2 and Alpha 2 ranges. Existing union nuts usually transfer over without pipework changes.
Which control mode should I select?
Δp-v for radiator circuits with TRVs; Δp-c for underfloor heating manifolds with thermal actuators. The three fixed-speed curves replicate traditional 3-speed pump behaviour if a boiler manufacturer specifies a fixed setting.
How much energy will it save?
Compared with a typical older 3-speed pump averaging 60–90 W, the Yonos PICO range typically runs at 5–25 W in normal heating operation — in the order of £40–£80 per UK heating season in electricity savings, depending on tariff and runtime.
