GRUNDFOS - 3 Speed Pumps CAST IRON UPS15-58FC 115 3-speed, 1/25 HP, flanged housing - 59896341

The Grundfos UPS15-58FC Circulator Pump (59896341) is a dependable 3-speed cast iron hydronic circulator engineered for residential and commercial heating, cooling, and HVAC systems. Operating on 115V with a 1/25 HP motor, this maintenance-free canned rotor pump features a corrosion-resistant composite impeller, ceramic bearings, and a durable cast iron flanged housing. The three-speed selector allows installers to optimize flow and head for a wide variety of closed-loop hydronic systems, including radiant floor heating, boilers, fan coils, geothermal systems, and chilled water applications. Its quiet operation, low energy consumption, and long service life make it an industry-standard circulator.

Cross References
Grundfos — 59896341 (UPS15-58FC)
Taco — 007-F5-8IFC / 0015-MSF2-1IFC (comparable applications)
Bell & Gossett — NRF-25

These are widely recognized functional equivalents for similar hydronic heating applications, but system sizing should always be verified before substitution.

Usage

The Grundfos UPS15-58FC is designed to circulate water in closed-loop hydronic heating and cooling systems. Typical applications include residential boilers, radiant floor heating, baseboard heating, fan coil units, geothermal systems, district heating, solar heating, and chilled water systems. The built-in 3-speed selector allows installers to match pump performance to the system's flow requirements, improving efficiency and comfort. Because it has a cast iron housing, this model is intended for closed-loop HVAC systems and is not recommended for potable domestic hot water recirculation.