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.

Features & Benefits 

• ALPHA1 can replace more than 30 other pump models  
• ALPHA1 features the highest torque rating and most powerful start feature in its class which attempts to restart indefinitely every seven seconds in blocked rotor conditions  
• Designed with trusted Grundfos ECM (permanent magnet motor) technology which has been used by Grundfos for more than 15 years 
  ALPHA1 features three-constant pressure control modes with easy to use push button settings 
• Large LED display shows energy watt consumption and flow indicator in gallons per minute  
• Available in both cast iron and stainless steel models  
• ALPHA1 is compatible with either a line cord or terminal box for conduit connections  
• Extremely quiet 19.2 dB(A) operation – tested in one of the best European sound labs  
• ALPHA1 features an integrated check-valve and nut captures for flanges  
• Magnetite resistant design with a stainless-steel bearing plate, robust ceramic shaft and ceramic bearing rings

The GRUNDFOS ALPHA1 is suitable for: 

• Systems with constant or varying flow 
• One pipe systems 
• Two pipe systems 
• Underfloor-heating 
• Domestic hot-water recirculation 
• Systems where night setback is required.