Grundfos 92603108 Grundfos ALPHA ECM Recirculation Pump, 1/25 HP, 115V, 9H, Cast Iron, Rotated Flange -  15-58FR (92603108)
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Grundfos ALPHA ECM Recirculation Pump, 1/25 HP, 115V, 9H, Cast Iron, Rotated Flange - 15-58FR (92603108)

SKU: 924300
$ 271.54 / ea
Save 23% · Retail: $353.00

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About the Grundfos ALPHA ECM Recirculation Pump, 1/25 HP, 115V, 9H, Cast Iron, Rotated Flange - 15-58FR (92603108)

Keep the flow steady with a pump that's always ready!


The ALPHA 15-58FR circulating pump with cast iron rotated flange and check valve from Grundfos is designed to optimize the circulation of liquids within heating systems. Featuring an electronically commutated motor (ECM), this pump offers the best HI energy rating on the market. What’s more? Its operating panel provides quick access to three control modes—constant curve (zone pump), constant pressure (zone valve), and proportional pressure (thermostatic radiator valve (TRV))—each with three pump settings to suit your specific needs. In addition to its advanced features, this pump also highlights an AUTOADAPT setting that enables it to respond to changes in consumption patterns and system load, eliminating the need to manually choose the pump setpoint. It continuously analyzes the system and adjusts the pressure based on real-time data, enhancing both comfort and efficiency.


With a maximum flow rate of 13.6 GPM and a liquid temperature range from 36 degrees to 230 degrees Fahrenheit, this ALPHA 15-58FR circulating pump is designed to handle a wide variety of indoor applications. Dry-run protection is another standout feature of this pump. By detecting the absence of air and automatically stopping the pump, this feature prevents potential damage and costly repairs, ensuring longevity and efficiency. Not only that, but noise and performance issues are a thing of the past with this circulator pump’s automatic self-venting feature. Self-venting eliminates air pockets within the system, which can cause noise and reduce efficiency. Additionally, its intuitive digital troubleshooting makes it easy to identify and resolve pump issues with the Grundfos GO app. Simply connect to the pump via Bluetooth, and the app will assist you in diagnosing and fixing problems while also providing access to historical trend data and minimizing downtime. Plus, the system air detection and venting mode are also activated using the GO app.


Operating on a supply voltage of 115 volts with a power usage ranging from 3 to 38 watts, this pump provides a reliable solution for your heating system needs. Moreover, it offers flexible installations in tight spaces with its compact conduit box. In line with that, the toolless lever connector adds convenience by enabling quick and secure electrical connections, reducing installation time and complexity. Lastly, this pump also boasts an unblocking feature that minimizes the risk of blockages with its anti-magnetic shafts and bearings. In the rare event of a blockage, the pump's intelligent system shifts between different torque levels to shake the rotor loose, ensuring continuous operation. To know more about what this pump has to offer, you can read through our Introducing Grundfos UPSe and New ALPHA Circulator Pumps blog.


Experience unparalleled efficiency, reliability, and ease of use in your heating systems when you get this Grundfos ALPHA 15-58FR circulating pump. Order yours today at an affordable price here at PlumbersStock!

Manufacturer: Grundfos
Product: Pumps
Pump Type: Recirculation Pump
Color: Red/Black
Housing Material: Electrocoated Cast Iron
Connection Type: Flanged
Pressure Rating: 175 PSI
Motor Type: Single Phase
Modus Operandi: AC Electrical
Electrical Voltage: 115 Volt
Wattage: 38 Watts
Flow Rate: 13.6 GPM
Installation Location: Indoor
Length: 6.5"
Width: 5.3''
Height: 5.3"
Sound Level: 25 dB(A)
Other Info: cULus Listed
  FCC
Temperature Range: 36° to 203°F
Pump Features: AUTOADAPT
  Dry-Run Protection
  WiFi Compatible
  ECM Technology
  Automatic Venting
Amperage: .7 Amps
Mpn # 92603108
Shipping Dimensions 9.0" x 6.5" x 8.0"
Weight 6.00 lbs.
  • Top HI Energy Rating: This circulator pump is equipped with an electronically commutated motor, achieving the best HI energy rating on the market. This means it consumes significantly less power compared to traditional pumps, translating to lower energy bills and a reduced carbon footprint. By investing in this pump, you are choosing an eco-friendly and cost-effective solution that helps you save money while supporting environmental sustainability.
  • Versatile Control Options: It offers constant-pressure, proportional-pressure, and constant-speed curves, each with three adjustable settings. This versatile control ensures that the pump can be precisely tailored to meet the specific requirements of various heating systems. Plus, it comes with an AUTOADAPT feature that removes the need to manually select the pump setpoint.
  • Quiet and Efficient Operation: Operating at less than 25 decibels, this circulator pump ensures a quiet environment, making it ideal for settings where noise levels are a concern, such as residential homes, offices, and commercial spaces. Enjoy the benefits of a powerful pump without the disruptive noise, enhancing overall comfort and peace of mind.
  • Robust and Reliable: It is designed to deliver robust startup performance, self-venting capability, and dry-running protection, significantly reducing the risk of operational issues. This ensures that the pump runs smoothly and efficiently. As a result, you can expect fewer service calls and maintenance visits, saving you time, money, and hassle for a long time.
  • Durable Construction: This pump’s electrocoated cast iron housing provides enhanced durability and corrosion resistance, ensuring this circulating pump can withstand the rigors of daily use. Additionally, its flanged connections offer a secure and reliable interface with your plumbing system, contributing to its overall longevity and dependability.
  • Wide Operating Range: It is capable of handling a broad range of ambient temperatures from 32 degrees to 131 degrees Fahrenheit and liquid temperatures from 36 degrees to 230 degrees Fahrenheit. Additionally, it supports a maximum outlet pressure of 175 PSI, ensuring reliable performance under various conditions.
  • User-Friendly Troubleshooting: Easily identify and troubleshoot various pump problems with the Grundfos GO app. You can connect your device to the pump through Bluetooth, and the app provides assistance to help you address any issues and also access historical trend data. Additionally, you can also run guided setup, set custom control modes, and run firmware updates for added convenience.
  • Simplified Installation: Installing this pump is a breeze thanks to the innovative toolless, removable power connector, allowing for quick and easy setup. Additionally, the terminal box with conduit connections simplifies the power connection process, making it more convenient and less time-consuming. Plus, its rotated flanged connection is useful in complex or retrofit installations where existing piping may not align perfectly with the pump.
  • Compliance and Safety: This pump is for indoor use only with enclosure type 2. Furthermore, it is cULus and FCC compliant, meeting stringent safety and performance standards required for class B digital devices under FCC Part 15. These certifications ensure the pump operates safely and reliably, providing assurance that you are using a product that adheres to high-quality standards and regulatory requirements.

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