Grundfos ALPHA1 25-60 180

The ALPHA1 25-60 180 is a versatile, medium-head circulator pump from Grundfos’ ALPHA1 series, delivering 6 metres (60 kPa) of head pressure with a 180 mm flange-to-flange distance. Designed for systems that require the longer 180mm flange spacing (common in older and larger installations), this pump offers simple 3-speed manual control – no complex electronics, no AUTOADAPT – just reliable, predictable performance. The standard 25mm connections ensure compatibility with residential piping systems.

Key Benefits

• Optimal 6m Head (60 kPa): Ideal for 2-3 storey homes, longer pipe runs, or systems with moderate resistance.

• 180mm Flange Distance: Direct replacement for older 180mm circulators from Grundfos UPS, Wilo, and other brands.

• Standard 25mm Connections: Direct fit for residential piping systems without requiring adapters.

• Simple 3-Speed Manual Control: No complex settings – just choose speed 1, 2, or 3 based on your system needs.

• Energy Efficient: Consumes up to 50% less energy than older UNO pumps.

• Proven Reliability: Based on Grundfos’ legendary UPS platform with modern motor improvements.

Performance Details
The ALPHA1 25-60 180 delivers a maximum head of 6 metres (60 kPa) and a maximum flow rate of 3.5 m³/h. The pump features simple 3-speed manual control:

The pump includes a manual air purge screw and status LED for basic operation monitoring.

Applications & Usage

• Medium-to-large residential heating (2-3 stories, 2500-4500 sq ft)

• Duplexes and townhouses

• Light commercial hydronic heating (small offices, retail spaces)

• Domestic hot water recirculation (medium loops)

• Replacement for older UPS 25-60 180 pumps

• Systems where AUTOADAPT is not desired or compatible

• Radiator systems with moderate resistance

• Hybrid systems (radiators + underfloor heating zones)

ALPHA1 vs ALPHA2 (25-60 180): Which Should You Choose?

Choose ALPHA1 for budget-friendly replacement with simple operation. Choose ALPHA2 for maximum energy savings (as low as 6W) and automatic optimisation.

Why 180mm Flange?
The 180mm flange distance is commonly found in:

• Older residential heating systems (pre-2000s)

• Larger homes with bigger mechanical rooms

• Light commercial installations

• Systems originally installed with Grundfos UPS 25-60 180 or Wilo equivalents

Durability & Reliability
Engineered for demanding continuous operation:

• Stainless steel rotor can – corrosion-resistant

• Ceramic bearings – self-lubricating, wear-resistant (50,000+ hours)

• Dry-running protection – thermal overload protection

• Manual air purge screw – easy de-airing during installation

• Cast iron housing – durable for decades

• IP42 rating – protected against dust and dripping water

• Graphite thrust bearing – reduces wear over time

Customer Value
For NPF Store customers seeking a reliable, budget-friendly replacement for an older 180mm flange circulator, the ALPHA1 25-60 180 delivers the perfect balance of power and efficiency. It directly replaces older UPS 25-60 180 pumps (and many other brands) without pipe modification. While not as energy-efficient as the ALPHA2 series, it offers significant savings over older UNO pumps and provides simple, predictable operation that many technicians and DIYers prefer. The 6m head is sufficient for most 2-3 storey homes.

4. Key Features

• ✅ 6m Head (60 kPa) – Perfect for 2-3 storey homes and moderate-resistance systems

• ✅ 180mm Flange Distance – Direct replacement for older, larger circulators

• ✅ Standard 25mm Connections – Direct fit for residential piping systems

• ✅ 3-Speed Manual Control – Simple, predictable operation (no complex settings)

• ✅ Flow Rate (3.5 m³/h) – Adequate for medium-to-large residential systems

• ✅ Permanent Magnet Motor – More efficient than older induction motors

• ✅ Manual Air Purge Screw – Easy de-airing during installation

• ✅ Status LED – Basic operation monitoring

• ✅ Thermal Overload Protection – Prevents damage from dry running or blockage

• ✅ Cast Iron Housing – Corrosion-resistant and durable

• ✅ Ceramic Bearings – Long service life (50,000+ hours)

• ✅ Quiet Operation – < 45 dB at 1m

5. Technical Specifications