Name: Wilo Yonos PICO 25/1-8-180 Circulator Pump
SKU: 4215517
Price: 131.54 GBP
Availability: InStock

Wilo Yonos PICO 25/1-8-180 Circulator Pump

Established 1975
Trusted by thousands of customers

High-efficiency glandless circulator for sealed heating and cooling systems — 7.6 m max head, 180 mm port-to-port, G1½ (DN25) connection.

7.6 m head4.4 m³/hG1½ DN254–75 WEEI ≤ 0.23

Full Description

More about this product

Full Description

The Wilo Yonos PICO 25/1-8-180 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

7.6 m

Max head

4.4 m³/h

Max flow

G1½

Connection (DN25)

4–75 W

Power use

180 mm

Port-to-port

1~230 V

Supply

PN10

Max pressure

≤ 0.23

Energy index

Key features

Smart pressure control

Variable (Δp-v) and constant (Δp-c) differential-pressure modes, plus three fixed speeds, matched to radiator or underfloor circuits.

High-efficiency ECM motor

Blocking-current-proof synchronous motor that uses a fraction of the energy of older fixed-speed pumps.

Green-button set-up

One control sets the mode and head; the LED display shows the setpoint, live power in watts and flow in m³/h.

Tool-free wiring

Wilo-Connector plug for fast, secure electrical connection without tools.

Self-maintaining

Automatic deblocking, manual venting and manual restart functions are built in.

Direct replacement size

180 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

Δp-v — variable

Pump head rises and falls with flow demand. Best for most two-pipe radiator systems.

Δp-c — constant

Head held constant across the flow range. Suits underfloor heating and higher-resistance circuits.

Fixed speed

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	180 mm
Pump housing	Grey cast iron
Impeller	PP-GF40
Shaft / bearing	Stainless steel / carbon
Net weight	≈ 1.9 kg
Approvals	CE, VDE, EAC
Article number	4215517

Frequently asked questions

What systems is this pump designed for?

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.

Which control mode should I use?

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.

Will it replace an older fixed-speed pump?

In most cases yes — the 180 mm port-to-port length and G1½ connections match common standard-length circulators, and the high-efficiency motor typically uses far less energy.

What does the model number mean?

25 is the DN25 connection, the second number the maximum head in metres, and the last the port-to-port length in millimetres.

Delivery Information

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.