GRUNDFOS - ALPHA2 - STAINLESS STEEL (without temp sensor)-Hot Water Recirculation 115 Variable speed, 5-45W, 0.65A, flanged - 99163972

The Grundfos ALPHA2 15-55 SF/LC (MPN 99163972) is a premium stainless steel ECM variable speed circulator designed for domestic hot water recirculation systems with a dedicated return line. Featuring AUTOADAPT technology, proportional pressure control, constant pressure control, and variable speed operation, this high-efficiency circulator automatically adjusts performance to system demand for maximum comfort and minimum energy consumption. The NSF-approved stainless steel pump housing is suitable for potable water applications, while the maintenance-free wet rotor design delivers quiet, reliable operation. This version does not include an external temperature sensor, making it ideal for systems using independent controls or external management devices.

Cross References

• Grundfos — 99163972
• Grundfos — ALPHA2 15-55 SF/LC
• Grundfos — ALPHA2 Stainless Steel Hot Water Recirculation Pump

Usage

The Grundfos ALPHA2 15-55 SF/LC is installed in domestic hot water recirculation systems with a dedicated return line to provide instant hot water throughout residential and light commercial buildings. Its stainless steel construction makes it suitable for potable water systems, while the ECM motor automatically adjusts speed according to system demand through AUTOADAPT, proportional pressure, or constant pressure modes. Since this version does not include a temperature sensor, it is commonly used with external controls or building management systems where temperature regulation is handled separately.