Wilo Yonos PICO 25/1-8-130 Circulator Pump
- Established 1975
- Trusted by thousands of customers
High-efficiency glandless circulator for sealed heating and cooling systems — 7.6 m max head, 130 mm port-to-port, G1½ (DN25) connection.
More about this product
The Wilo Yonos PICO 25/1-8-130 is a high-efficiency, electronically controlled glandless (wet-rotor) circulator for sealed central heating and cooling systems. Its ECM motor and automatic differential-pressure control match output to demand, cutting running costs against older fixed-speed pumps while keeping flow quiet and stable. A single green button and clear LED display make set-up straightforward, and an energy efficiency index of EEI ≤ 0.23 keeps running costs low against older fixed-speed pumps.
At a glance
Key features
Variable (Δp-v) and constant (Δp-c) differential-pressure modes, plus three fixed speeds, matched to radiator or underfloor circuits.
Blocking-current-proof synchronous motor that uses a fraction of the energy of older fixed-speed pumps.
One control sets the mode and head; the LED display shows the setpoint, live power in watts and flow in m³/h.
Wilo-Connector plug for fast, secure electrical connection without tools.
Automatic deblocking, manual venting and manual restart functions are built in.
130 mm port-to-port with G1½ unions matches common standard-length circulators for straightforward upgrades.
Where it’s used
Designed for sealed, closed-loop systems: two-pipe and single-pipe radiator heating, underfloor heating, air-conditioning and chilled-water circuits. The grey cast-iron housing is intended for heating and cooling water only — for domestic hot-water (drinking-water) recirculation, use the stainless-steel Yonos PICO-Z instead.
Control modes
Pump head rises and falls with flow demand. Best for most two-pipe radiator systems.
Head held constant across the flow range. Suits underfloor heating and higher-resistance circuits.
Three constant speed stages for simple set-ups or when matching a fixed duty point.
Technical specification
| Max operating pressure | PN10 (10 bar) |
|---|---|
| Max head | 7.6 m |
| Max flow | 4.4 m³/h |
| Fluid temperature | −10 °C to +95 °C |
| Ambient temperature | −10 °C to +40 °C |
| Min. suction head (50 / 95 / 110 °C) | 0.5 / 3 / 10 m |
| Mains supply | 1~230 V ±10%, 50/60 Hz |
| Rated power P2 | 58 W |
| Power consumption P1 | 4–75 W |
| Speed range | 500–4800 rpm |
| Energy efficiency index | EEI ≤ 0.23 |
| Insulation / protection | Class F / IPX4D |
| Connection | G1½ (Rp1, DN25) |
| Port-to-port length | 130 mm |
| Pump housing | Grey cast iron |
| Impeller | PP-GF40 |
| Shaft / bearing | Stainless steel / carbon |
| Net weight | 1.8 kg |
| Approvals | CE, VDE, EAC |
| Article number | 4215518 |
Frequently asked questions
Sealed heating and cooling circuits — radiators, underfloor heating, air-conditioning and similar closed systems. The cast-iron housing is not for drinking-water circulation; for hot-water recirculation choose the Yonos PICO-Z.
Variable differential pressure (Δp-v) suits most two-pipe radiator systems; constant differential pressure (Δp-c) suits underfloor heating and higher-resistance circuits; three fixed speeds are available for simple set-ups.
In most cases yes — the 130 mm port-to-port length and G1½ connections match common standard-length circulators, and the high-efficiency motor typically uses far less energy.
25 is the DN25 connection, the second number the maximum head in metres, and the last the port-to-port length in millimetres.
Standard delivery:
Standard delivery is free on most orders. Some items may incur a delivery charge depending on weight, size or value. Any applicable charge will be displayed at checkout.
Deliveries will typically be made between 7am and 6pm, Monday to Friday (excluding public holidays).
Next day delivery:
Next working day delivery is available for a £16.50 + VAT delivery charge.
Orders must be placed before 12 noon to qualify for next working day delivery. Orders placed after 12 noon on Thursday but before noon on Friday will be delivered the following Monday. Orders placed after 12 noon on Friday will be delivered on Tuesday.
Pallet/Large/Difficult items:
Some large, heavy or difficult to transport items may incur an additional delivery charge. Please contact us for a delivery quote before ordering.
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