Grundfos 52722370 UP43-75BF 1/6 HP 115V Hydronic Circulator Pump

The Grundfos UP43-75BF (SKU 52722370) is a high-quality hydronic circulating pump engineered for dependable performance in residential and light commercial heating systems. Operating on 115V single-phase power and rated at 1/6 horsepower, this circulator is designed to efficiently move heated water through boiler loops, radiant floor systems, and baseboard heating circuits.

Grundfos is a globally recognized leader in pump technology, and the UP43-75BF reflects that heritage with robust construction and long service life. Its compact, inline design simplifies installation in tight mechanical spaces, while the wet-rotor motor eliminates the need for external lubrication — reducing maintenance demands and extending operational longevity.

Key Features

• Model: UP43-75BF
• SKU / Part Number: 52722370
• Voltage: 115V single-phase
• Horsepower: 1/6 HP
• Wet-rotor design — no external lubrication required
• Inline installation for easy integration into existing piping
• Ideal for hydronic heating, radiant floor, and baseboard systems
• Compact footprint suitable for residential and light commercial applications

Applications

• Hot water boiler circulation loops
• Radiant floor heating systems
• Baseboard and panel radiator systems
• Domestic hot water recirculation

Why Choose Grundfos?

Grundfos pumps are trusted by HVAC professionals worldwide for their energy efficiency, quiet operation, and long service life. The UP43-75BF continues this tradition, offering a reliable solution for hydronic comfort heating applications where consistent flow and low maintenance are essential.