Grundfos Alpha 1 L: Universal Boiler Circulator | Prices

Grundfos Alpha 1 Pumps

Grundfos Alpha 1 L Pumps and Circulators

The compact universal circulator for replacements and boilers

The Grundfos Alpha 1 L range is designed with one goal in mind: versatility. It's the only circulation pump designed to fit and be compatible with 95% of boilers equipped with Grundfos pumps . If you're looking for an economical, robust, and easy-to-install replacement, this is the right choice.

Strengths of the Alpha 1 L series:

Universal: Perfect both as a stand-alone unit for radiators/floor heating, and integrated into wall-mounted boilers.
Compact Design: Designed to fit into tight spaces where other pumps can't.
Quiet and Reliable: Ceramic shaft and bearings for long life and noiselessness.
Easy Release: Accessible front screw to manually unlock the pump after long periods of inactivity (e.g. in summer).

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There are 18 products.

-44%

Grundfos circulator ALPHA SOLAR 25-145 180 cod.98989297

Available

Grundfos circulator ALPHA SOLAR 25-145 180 cod.98989297
Useful to

Heating in commercial buildings
Home heating
Industrial heating

ALPHA SOLAR is a circulator designed for thermal solar systems. It features three constant curve modes and the speed can also be controlled by a low voltage PWM signal from a solar controller.

€488.15

€871.70

-44%

Grundfos circulator ALPHA SOLAR 25-75 130 cod.98989299

Available

rundfos circulator ALPHA SOLAR 25-75 130 cod.98989299
Useful to

Heating in commercial buildings
Home heating
Industrial heating

ALPHA SOLAR is a circulator designed for thermal solar systems. It features three constant curve modes and the speed can also be controlled by a low voltage PWM signal from a solar controller.

€455.95

€814.20

-44%

Grundfos circulator ALPHA SOLAR 25-75 180 cod.98989300

Available

Grundfos circulator ALPHA SOLAR 25-75 180 cod.98989300
Useful to

Heating in commercial buildings
Home heating
Industrial heating

ALPHA SOLAR is a circulator designed for thermal solar systems. It features three constant curve modes and the speed can also be controlled by a low voltage PWM signal from a solar controller.

€455.95

€814.20

-43%

Grundfos circulator ALPHA SOLAR 15-75 130 cod.98989298

Available

Grundfos circulator ALPHA SOLAR 15-75 130 cod.98989298
Useful to

Heating in commercial buildings
Home heating
Industrial heating

ALPHA SOLAR is a circulator designed for thermal solar systems. It features three constant curve modes and the speed can also be controlled by a low voltage PWM signal from a solar controller.

€447.71

€785.45

-50%

Grundfos circulator Alpha1 L 32-60 180 code 99160590

Available

Grundfos variable speed circulator ALPHA1 L 32-60 180 code 99160590
Useful to

Heating in commercial buildings
Home heating
Industrial heating

ALPHA1 L is a high efficiency circulator designed for heating systems. The pump can be used autonomously or integrated in existing systems as a replacement component or in new heating systems

€251.28

€502.55

-48%

Grundfos circulator ALPHA1 L 32-40 180 code 99160587

Available

Grundfos variable speed circulator ALPHA1 L 32-40 180 code 99160587
Useful to

Heating in commercial buildings
Home heating
Industrial heating

ALPHA1 L is a high efficiency circulator designed for heating systems. The pump can be used autonomously or integrated in existing systems as a replacement component or in new heating systems.

€237.41

€456.55

-53%

Grundfos circulator Alpha1 L 25-60 180 code 99160584

Available

Grundfos variable speed circulator ALPHA1 L 25-60 180 code 99160584
Useful to

Heating in commercial buildings
Home heating
Industrial heating

ALPHA1 L is a high efficiency circulator designed for heating systems. The pump can be used autonomously or integrated in existing systems as a replacement component or in new heating systems.

€224.85

€478.40

-51%

Grundfos circulator Alpha1 L 25-40 180 cod. 99160579

Available

Grundfos variable speed circulator ALPHA1 L 25-40 180 code 99160579
Useful to

Heating in commercial buildings
Home heating
Industrial heating

ALPHA1 L is a high efficiency circulator designed for heating systems. The pump can be used autonomously or integrated in existing systems as a replacement component or in new heating systems.

€203.42

€415.15

-53%

Grundfos circulator Alpha1 L 25-60 130 code 99160583

Available

Grundfos variable speed circulator ALPHA1 L 25-60 130 code 99160583
Useful to

Heating in commercial buildings
Home heating
Industrial heating

ALPHA1 L is a high efficiency circulator designed for heating systems. The pump can be used autonomously or integrated in existing systems as a replacement component or in new heating systems.

€224.85

€478.40

-51%

Grundfos circulator Alpha1 L 25-40 130 cod. 99160578

Available

Grundfos variable speed circulator ALPHA1 L 25-40 130 code 99160578
Useful to

Heating in commercial buildings
Home heating
Industrial heating

ALPHA1 L is a high efficiency circulator designed for heating systems. The pump can be used autonomously or integrated in existing systems as a replacement component or in new heating systems.

€203.42

€415.15

-49%

Grundfos circulator Alpha1 L 15-65-130 code 99165123

Available

Grundfos variable speed circulator Alpha1 L 15-65-130 code 99165123
Useful to

Heating in commercial buildings
Home heating
Industrial heating

ALPHA1 L is a high efficiency circulator designed for heating systems. The pump can be used autonomously or integrated in existing systems as a replacement component or in new heating systems.

€280.93

€550.85

-57%

Grundfos circulator Alpha1 L 15-60 130 cod. 99160574

Available

Grundfos variable speed circulator Alpha1 L 15-60 130
Useful to

Heating in commercial buildings
Home heating
Industrial heating

ALPHA1 L is a high efficiency circulator designed for heating systems. The pump can be used autonomously or integrated in existing systems as a replacement component or in new heating systems.

€225.99

€525.55

-55%

Grundfos circulator Alpha1 L 15-40 130 Cod. 99160550

Available

Grundfos variable speed circulator Alpha1 L 15-40 130
Useful to

Heating in commercial buildings
Home heating
Industrial heating

ALPHA1 L is a high efficiency circulator designed for heating systems. The pump can be used autonomously or integrated in existing systems as a replacement component or in new heating systems.

€205.45

€456.55

-29%

Grundfos variable speed circulator ALPHA1 L 20-40 130 code 99160575

Available

Grundfos variable speed circulator ALPHA1 L 20-40 130 code 99160575
Useful to

Heating in commercial buildings
Home heating
Industrial heating

ALPHA1 L is a high efficiency circulator designed for heating systems. The pump can be used autonomously or integrated in existing systems as a replacement component or in new heating systems.

€324.15

€456.55

-29%

Grundfos variable speed circulator ALPHA1 L 20-60 130 code 99160577

Available

Grundfos variable speed circulator ALPHA1 L 20-60 130 code 99160577
Useful to

Heating in commercial buildings
Home heating
Industrial heating

ALPHA1 L is a high efficiency circulator designed for heating systems. The pump can be used autonomously or integrated in existing systems as a replacement component or in new heating systems.

€373.14

€525.55

-6%

Grundfos MI401 ALPHA Reader cod. 98916967

Available

Grundfos MI401 ALPHA Reader cod. 98916967
ALPHA Reader is a mobile product for hydronic balancing of radiators in combination with ALPHA2 and ALPHA3 and a Bluetooth-enabled smartphone with the Grundfos GO app.
Available for iOS and Android devices.

€237.82

€253.00

-6%

Grundfos ALPHA PLUG cod. 98284561

Available

Grundfos ALPHA PLUG cod. 98284561
The connectors are used to connect the power cord to the pump.

€38.92

€41.40

-6%

Grundfos angular plug ALPHA cod. 98610291

Available

Grundfos angular plug ALPHA cod. 98610291
The connectors are used to connect the power cord to the pump.

€41.08

€43.70

Alpha 1 L vs. Alpha 2: Which One Should You Choose?

Our customers often ask us, “Why is the Alpha 1 cheaper than the Alpha 2?”

The Alpha 1 L is the "essential" version. It guarantees the same Grundfos build quality and energy-efficient motors, but forgoes the advanced "smart" features (such as the watt display or Bluetooth). It's the ideal pump for those who want to "set it and forget it," without having to configure apps or complex parameters.

🔧 Ideal as a Boiler Replacement (OEM)

The "L" designation stands for compact geometry. If you need to replace the internal pump in your boiler (e.g., Vaillant, Immergas, and Baxi, which come standard with Grundfos), the Alpha 1 L is often the only one that fits into the tight housing.

It also supports PWM (Low Voltage) signal , which is necessary if your boiler controls the pump speed electronically.

Simplified Operating Modes

Despite being the basic model, it offers everything you need for a home system:

Radiator Mode: Adjusts pressure proportionally to demand.
Floor Mode: Maintains constant pressure for maximum comfort.
Fixed Speeds: 3 classic selectable speeds, just like the old 3-step pumps.

Frequently Asked Questions (FAQ)

Does it include the power cord?

No, the Alpha 1 L has direct or pluggable connections. Typically, you reuse the boiler's existing wiring or purchase the connector separately. If you need to use it with a PWM signal, make sure you have the appropriate signal cable (often sold as an accessory).

Can I use it to replace an old Grundfos UPS 25-50 or 15-50?

Yes, absolutely. The Alpha 1 L is the natural replacement for the older UPS series. Just check the center distance (the length from nut to nut): if it's 130mm, choose the 15-60 or 25-60 130 model. If it's 180mm, choose the standard models.

What does the abbreviation 15-60 or 25-60 mean?

The first number (15 or 25) indicates the nominal diameter of the pipe (15mm or 25mm). The second number (40 or 60) indicates the maximum head, i.e., the thrust: 40 stands for 4 meters, 60 for 6 meters. If you have a two-story home or underfloor heating, we always recommend the "60" version for more power.

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Latest posts

Grundfos Alpha 1 L Pumps and Circulators

The compact universal circulator for replacements and boilers

Alpha 1 L vs. Alpha 2: Which One Should You Choose?

🔧 Ideal as a Boiler Replacement (OEM)

Simplified Operating Modes

Frequently Asked Questions (FAQ)

Does it include the power cord?

Can I use it to replace an old Grundfos UPS 25-50 or 15-50?

What does the abbreviation 15-60 or 25-60 mean?

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