Grundfos ALPHA2 25-80 130

The ALPHA2 25-80 130 is a premium, high-performance circulator pump from Grundfos’ award-winning ALPHA2 series. Delivering an impressive 8 meters (80 kPa) of head pressure in the industry-standard 130mm flange-to-flange format, this pump is engineered for demanding residential heating applications. Unlike basic 3-speed pumps, the ALPHA2 features intelligent AUTOADAPT technology that continuously optimizes performance based on your system’s real-time needs. The combination of 8m head, 4.5 m³/h flow, and energy efficiency as low as 6W makes this the ultimate upgrade for large homes with stubborn cold radiators on upper floors.

Key Benefits

• High Head (8m / 80 kPa): Maximum pressure for multi-story buildings (3+ floors), long pipe runs, and high-resistance radiator systems with many TRVs.

• Industry-Standard 130mm Flange: Direct drop-in replacement for thousands of existing pumps – no pipe modification required.

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

• Massive Energy Savings: Consumes as little as 6 Watts – up to 85% less energy than older UPS 25-80 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 25-80 130 delivers a maximum head of 8 meters (80 kPa) and a maximum flow rate of 4.5 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 8m Head (80 kPa)?
Most residential circulators deliver only 4-6 meters of head. The 8m head of the ALPHA2 25-80 130 is specifically designed for:

• 3+ story homes – Pushing water to upper floors against gravity

• High-resistance systems – Many radiator valves (TRVs), small bore pipes, or long pipe runs

• Systems with zone valves – Additional pressure drop from multiple zone valves

• Large homes – Extended pipe networks with significant friction loss

Symptoms You Need an 8m Pump:

• Upper floor radiators are cold or lukewarm while lower floors are hot

• Boiler short-cycling due to insufficient flow

• Slow heating response in distant rooms

• Current pump running constantly on highest speed but still struggling

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

Applications & Usage

• Large residential heating – 3+ story homes, 3,500-6,000+ sq ft

• High-resistance radiator systems – Many TRVs, small bore pipes (10-15mm), long pipe runs

• Multi-family buildings – 2-4 unit apartments, townhouses with multiple floors

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

• Domestic hot water recirculation – Long, high-resistance loops

• Replacement for older UPS 25-80 130 pumps – Direct drop-in upgrade

• System expansions – Adding zones or extending pipework

ALPHA2 25-80 130 vs ALPHA1 25-80 130: Which to Choose?

Choose ALPHA2 if: You want maximum energy savings (pays for itself in 12-18 months) and automatic performance optimization.

ALPHA2 25-80 130 vs ALPHA2 25-60 130:

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 large homes or stubborn cold radiators on upper floors, the ALPHA2 25-80 130 is the ultimate solution. It directly replaces older UPS 25-80 pumps and other 130mm flange circulators without pipe modification. The combination of 8m head and AUTOADAPT technology ensures your upper floor radiators finally get the flow they need, while cutting energy bills by up to 85%. With an annual energy cost as low as $10-15 (at average electricity rates), this pump typically pays for itself within 12-18 months. For contractors, the drop-in 130mm flange and alarm relay output make it the professional choice for system upgrades.

4. Key Features

• ✅ 8m Head (80 kPa) – Maximum pressure for multi-story homes and high-resistance systems

• ✅ 130mm Flange Distance – Industry standard – direct replacement for most residential pumps

• ✅ 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 (6–55W)

• ✅ 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