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The Grundfos ALPHA series circulator pumps adapt to the variable demands of a system without sacrificing comfort. Using the AUTOADAPT feature, the Grundfos ALPHA will analyze the system and adjust to meet your heating demands. By incorporating a permanent magnet motor design, power consumption is now reduced by 50%. Features: AUTOADAPT measures system changes automatically and maximizes energy savings Easy-to-use operation Select a mode with the touch of a button Easy-to-read LED display shows flow indication and power consumption Simple plug connections No wiring required Terminal box for conduit connection applications GRUNDFOS ALPHA SERIES CIRCULATOR PUMPS Model Comparison Chart Model Pipe Connection (GF) HP Voltage Construction GPM Max. Head ALPHA 15-55F 15/26 1/16 115 Cast Iron 21 19' ALPHA 15-55SFC 15/26 1/16 115 Stainless Steel 21 19' ALPHA2 15-55SF/LC 15/26 1/16 115 Stainless Steel 21 19' PERFORMANCE CURVES FEATURES SPECIFICATIONS DIMENSIONS TROUBLESHOOTING SERIES OVERVIEW Grundfos ALPHA Series Circulator Pump Series Overview INSTRUCTIONS Grundfos ALPHA Series Circulator Pump Instructions Pump Products application engineers are standing by to help you find the right pump, as well as to provide price quotes, stocking availability and shipping information. Call our toll free number 1-800-429-0800 to speak to an expert today.