Grundfos ALPHA2 15-80 130

The ALPHA2 15-80 130 is a premium, high-performance compact circulator pump from Grundfos’ award-winning ALPHA2 series – the world’s most advanced residential circulator. Delivering an impressive 8 meters (80 kPa) of head pressure with compact 15mm (½”) connections in the industry-standard 130mm flange-to-flange format, this pump is specifically designed for high-resistance compact systems where space is limited but pressure is critical. Unlike standard 25mm pumps, the 15-series is engineered for combi boilers, small-bore pipe systems (microbore), and tight mechanical spaces. Featuring Grundfos’ intelligent AUTOADAPT technology, the pump automatically learns your system’s characteristics and continuously optimizes performance – no manual speed selection required.

Key Benefits

• High Head (8m / 80 kPa): Maximum pressure for high-resistance compact systems – perfect for combi boilers, microbore pipework, and multi-story apartments with small-bore piping.

• Compact 15mm (½”) Connections: Ideal for combi boilers, small-bore systems, and tight mechanical rooms where 25mm pumps won’t fit.

• Industry-Standard 130mm Flange: Direct drop-in replacement for older 15-series circulators – 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 15-80 or UNO pumps.

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

Performance Details
The ALPHA2 15-80 130 delivers a maximum head of 8 meters (80 kPa) and a maximum flow rate of 2.2 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 Choose the 15-Series (15mm / ½”)?
Most residential circulators use 25mm (1″) connections. The 15-series is designed for:

Flow Rate vs Pressure – The 15-80 Balance
The 15-80 delivers 8m of head but only 2.2 m³/h maximum flow (compared to 4.5 m³/h on the 25-80). This means:

• ✅ Excellent for high-resistance, low-flow systems (combi boilers, microbore, fan coils)

• ✅ Perfect for overcoming small-pipe friction loss

• ❌ Not suitable for large-volume, low-resistance systems (underfloor heating, large radiators)

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, TRVs adjusting, etc.)

Benefits of AUTOADAPT for Compact Systems:

• ✅ No manual speed selection – The pump finds the optimal setting for your combi boiler or microbore system

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

• ✅ Reduced system noise – No excess pressure causing whistling in small pipes

• ✅ Longer component life – Boiler heat exchangers and valves see less stress

ALPHA2 vs ALPHA1 (15-80 130): Which to Choose?

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

Applications & Usage

• Combi boilers (wall-hung) – Primary application for high-head combis ⭐

• Small-bore (microbore) heating systems – 8mm, 10mm, or 12mm pipework with high resistance

• High-resistance radiator systems – Many small radiators on long, small-diameter pipe runs

• Fan coil units (FCUs) – Single or paired units requiring high pressure

• Multi-story apartments – 2-3 story apartments with small-bore pipework

• Domestic hot water recirculation – Small-diameter, long loops with high resistance

• Tight mechanical rooms / boiler cupboards – Space-constrained installations

• Replacement for older UPS 15-80 130 pumps – Direct drop-in upgrade

ALPHA2 15-80 130 vs ALPHA2 15-60 vs 15-40:

Choose 15-80 if: You have a high-resistance system (microbore pipe, long runs, or multi-story with small pipes) or your combi boiler requires maximum pressure.

Durability & Reliability
Engineered for continuous operation in compact, demanding environments:

• 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 – durable and compact

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

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

Customer Value
For NPF Store customers with combi boilers, microbore systems, or tight mechanical spaces requiring high pressure, the ALPHA2 15-80 130 is the ultimate solution. It directly replaces older UPS 15-80 pumps and other 15mm circulators without pipe modification. The combination of 8m head (maximum pressure for small pipes), AUTOADAPT technology (automatic optimization), and massive energy savings (as low as 6W) ensures your compact system operates at peak efficiency. 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 130mm flange and alarm relay output make it the professional choice for combi boiler and microbore system upgrades.

4. Key Features

• ✅ 8m Head (80 kPa) – Maximum pressure for high-resistance combi boilers and microbore systems

• ✅ 15mm (½”) Connections – Compact size for combi boilers and tight spaces

• ✅ 130mm Flange Distance – Industry standard – direct replacement for most 15-series pumps

• ✅ 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

• ✅ Wet Rotor Design – Self-lubricating, maintenance-free

5. Technical Specifications