Grundfos ALPHA2 25-60 180

The ALPHA2 25-60 180 is a premium, energy-efficient circulator pump from Grundfos’ award-winning ALPHA2 series. Delivering 6 meters (60 kPa) of head pressure with a 180mm flange-to-flange distance and standard 25mm connections, this pump is specifically designed for larger residential systems that require the extended 180mm flange spacing. Featuring Grundfos’ intelligent AUTOADAPT technology, the pump automatically learns your system’s characteristics and continuously optimizes performance – no manual speed selection required. This is the perfect upgrade for older UPS 25-60 180 pumps, offering massive energy savings and automatic operation.

Key Benefits

• Optimal 6m Head (60 kPa): Perfect for 2-3 story homes, longer pipe runs, and moderate-resistance systems with 180mm flange spacing.

• 180mm Flange Distance: Direct drop-in replacement for older larger-format circulators (UPS 25-60 180, Wilo, etc.) – no pipe modification required.

• AUTOADAPT Technology: The pump automatically learns your system and continuously adjusts performance for peak efficiency.

• Massive Energy Savings: Consumes as little as 6 Watts – up to 85% less energy than older UPS 25-60 or UNO pumps.

• Standard 25mm Connections: Direct fit for residential piping systems (1″ or 1¼” with adapters).

• Alarm Relay Output: Remote fault signaling for integration with home automation or building management systems.

Performance Details
The ALPHA2 25-60 180 delivers a maximum head of 6 meters (60 kPa) and a maximum flow rate of 4.2 m³/h. The pump features multiple operating modes:

Additional features:

• Night setback mode – Automatic speed reduction for DHW recirculation during low-demand hours (2am-5am default)

• LED user interface – Color-coded status and fault indication for easy troubleshooting

• Alarm relay output – Remote fault signaling (volt-free contact)

Why 180mm Flange Distance?
The 180mm flange distance (center-to-center of mounting bolts) is commonly found in:

• Older residential heating systems (pre-2000s, especially in Europe)

• Larger homes with bigger mechanical rooms

• Light commercial installations

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

• Townhouses and duplexes with dedicated mechanical spaces

If you measure 180mm between bolt centers, this is your pump.

AUTOADAPT Technology Explained
Unlike simple 3-speed pumps where you guess the right setting, AUTOADAPT continuously monitors your heating system’s demand:

1. Learning phase (first few days): Pump maps your system’s pressure/flow characteristics

2. Optimization phase: Automatically selects the most efficient pressure curve

3. Continuous adjustment: Responds to changing conditions (zone valves closing, outdoor reset, etc.)

Benefits of AUTOADAPT:

• ✅ No manual speed selection – The pump finds the optimal setting for you

• ✅ Maximum energy savings – Never wastes energy over-pumping (as low as 6W)

• ✅ Reduced system noise – No excess pressure causing water hammer or pipe noise

• ✅ Longer component life – Valves, zone valves, and boiler components see less stress

ALPHA2 25-60 180 vs ALPHA2 25-60 130: Which to Choose?

Choose 180mm if: Your existing pump has 180mm flange spacing (measure bolt center-to-center).

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

Applications & Usage

• Large residential heating – 2-3 story homes, 2,500-5,000 sq ft with 180mm flange systems

• Duplexes and townhouses – Multi-unit residential with extended flange spacing

• Older heating system upgrades – Direct replacement for UPS 25-60 180 pumps

• Light commercial hydronic heating – Small offices, retail spaces with 180mm spacing

• Mixed heating systems – Radiators + underfloor heating (AUTOADAPT handles both)

• Domestic hot water recirculation – Medium-to-large loops

• System expansions – Adding zones or extending pipework

Durability & Reliability
Engineered for demanding continuous operation (24/7/365):

• Stainless steel rotor can (AISI 304) – corrosion-resistant

• Ceramic bearings & graphite thrust bearing – self-lubricating, wear-resistant (50,000+ hours typical life)

• Dry-running protection – automatic shutdown if water supply is interrupted

• Automatic de-airing function – self-venting during startup, prevents air lock damage

• Cast iron housing (EN-GJL-200) – durable for decades of service

• IPX4D splash-proof rating – safe for mechanical rooms and boiler rooms

• Alarm relay output – remote fault signaling for home automation/BMS integration

Customer Value
For NPF Store customers with older heating systems or those requiring 180mm flange spacing, the ALPHA2 25-60 180 is the ideal upgrade. It directly replaces older UPS 25-60 180 pumps and other 180mm flange circulators without pipe modification. The combination of 6m head, AUTOADAPT technology, and massive energy savings ensures your system operates at peak efficiency while cutting electricity costs by up to 85%. With an annual energy cost as low as $10-15, this pump typically pays for itself within 12-18 months. For contractors, the drop-in 180mm flange and alarm relay output make it the professional choice for system upgrades.

4. Key Features

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

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

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

• ✅ AUTOADAPT Technology – Self-optimizing performance, no manual tuning needed

• ✅ Energy Class A (EEI ≤ 0.20) – Ultra-low power consumption (6–45W)

• ✅ 85% Energy Savings – Compared to older UPS/UNO pumps

• ✅ Night Setback Mode – Automatic reduction for DHW recirculation

• ✅ Alarm Relay Output – Remote fault signaling for home automation

• ✅ Automatic Air Purge – Self-venting during installation and operation

• ✅ LED Status Display – Color-coded for easy troubleshooting

• ✅ Dry-Running Protection – Prevents damage from water loss

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

• ✅ 4 Operating Modes – AUTOADAPT, Constant Pressure, Proportional Pressure, Constant Curve

• ✅ Quiet Operation – < 43 dB – suitable for noise-sensitive installations

5. Technical Specifications