The only circulators you need – ALPHA1, ALPHA2 & ALPHA2 26-99

The only circulators you need - ALPHA Range

Boasting the lowest warranty return rate of any circulator, the Grundfos ALPHA product line replaces more than 40 pump models.

Put more efficiency in your toolbox with the ALPHA Range. 

Capable of replacing more than 40 other pump models, the ALPHA circulator range features the highest torque rating and most  powerful start feature in its class.

The ALPHA1 delivers three constant pressure control modes, a magnetite resistant design and stainless-steel bearing plate. The ALPHA2 builds on these capabilities with the addition of AUTOADAPT control mode which reduces energy consumption by up to 85%.

The NEW ALPHA2 26-99 extends the ALPHA range into medium sized circulators and features eight intelligent control modes including constant pressure AUTOADAPT and proportional pressure AUTOADAPT.

  • The only circulators you need –  replace more than 40 other pumps with the ALPHA Range
  • Trusted technology – ALPHA products are built with 16+ years ECM experience and 65+ years hydronic experience (we’re not rookies)
  • Shorten your installation time – helpful features including standard or rotated flanges, plug and play start-up and nut captures, allow for quick and simple installation
  • No call backs – ALPHA products have the lowest warranty return rate of any Grundfos pump
ALPHA1 Truck Sticker

Choosing the Right Pump for Your Job is Simple

Grundfos ALPHA products give you the flexibility to choose the right features for your application while keeping sizing and selection quick and easy.

Choose the right ALPHA pump for your application

ALPHA Product Line


The ALPHA1 is an energy efficient, variable-speed circulator built with reliable, electronically controlled Grundfos permanent magnet motor (ECM) technology. Featuring three-constant pressure control modes, an LED display and easy-to-use push button controls, the ALPHA1 is the perfect solution for domestic hydronic heating and hot water recirculation applications.



Boasting unrivalled energy efficiency and easy installation, ALPHA2 is the best pump to for covering your toughest heating demands, as well as 90% of air-conditioning and cooling demands. And with four newly added features, it just got even tougher. Robust start-up means it shakes free any impurities before the pump starts at the beginning of the heating season.


ALPHA2 26-99

The Grundfos ALPHA2 26-99 is a medium sized, energy efficiency circulator fitted with a permanent magnet motor (ECM) and frequency converter. Featuring eight different operating modes including constant pressure AUTOADAPT and proportional pressure AUTOADAPT, the ALPHA2 26-99 is the perfect fit for any heating application.

ALPHA2 26-99