Grundfos 59896341 UPS 15-58 FC Circulator Pump

Product Overview

The Grundfos 59896341 UPS 15-58 FC is a dependable three-speed hydronic circulator pump engineered for residential and light commercial heating, cooling, and hot-water recirculation systems. Built with a durable cast-iron housing and a high-efficiency motor, this model provides a balanced combination of quiet operation, strong hydraulic performance, and long service life.

With a maximum flow of 17.2 GPM and up to 19.36 feet of head, the UPS 15-58 FC adapts easily to varying system demands, making it a popular choice for baseboard heating, radiant heating loops, fan coils, and circulation circuits in HVAC installations. The pump includes built-in isolating and non-return valves, delivering faster installation and simplified service access.

Features & Benefits

• Three-speed motor for flexible system balancing and performance control
• Cast-iron pump housing (EN-JL1030 / ASTM 30B) for long-term durability
• Composite PES impeller designed for reliability and reduced wear
• Built-in isolating and non-return valves for easier installation and servicing
• UL and CSA listed for North American compliance
• Handles liquid temperatures from 35.6°F to 230°F
• Quiet operation with internal thermal protection for added safety
• Standard USA oval flange for direct replacement in most hydronic systems

Specifications

Technical Performance
Speed options: 3
Maximum flow: 17.2 US GPM
Maximum head: 19.36 ft
Approvals: UL, CSA
Included valves: Built-in isolating and non-return valves

Materials
Pump housing: Cast iron, EN-JL1030 / ASTM 30B
Impeller: Composite PES

Installation Requirements
Max ambient temperature: 104°F (or 176°F with matching liquid temperature)
Maximum operating pressure: 145.04 psi
Connection type: Cast-iron flange
Flange standard: USA oval, 2-bolt
Pressure rating: PN 10
Port-to-port length: 6.5 in

Liquid Handling
Pumped liquid: Water
Temperature range: 35.6°F – 230°F
Selected rating temperature: 140°F
Liquid density: 61.35 lb/ft³

Electrical Details
Voltage: 115V, single-phase
Frequency: 60 Hz
Max power input: 87 W
Current draw: 0.55A (speed 1), 0.66A (speed 2), 0.75A (speed 3)
Capacitor: 10 μF / 180 V
Poles: 2
Insulation class: F
Motor protection: Internal thermal

General Information
Gross weight: 7.25 lb
Country of origin: United States
HTS code: 8413.70.00.21

Installation Tips

• Flush system piping before installation to prevent debris-related wear.
• Mount the circulator horizontally with the motor shaft level.
• Use USA-standard oval flanges for proper sealing and alignment.
• Adjust speed settings after startup to balance performance and efficiency.
• Verify water temperature and pressure limits before operation.

Frequently Asked Questions

Is the UPS 15-58 FC compatible with radiant heating systems?
Yes. Its three-speed motor allows for precise control in radiant floor loops.

Does this pump include isolation valves?
Yes. Integrated isolating and non-return valves simplify servicing.

Can the pump operate with high-temperature hydronic water?
Yes. It supports liquid temperatures up to 230°F within ambient limits.

Is this pump a good replacement for older UPS 15-58 models?
Yes. It matches port length, flange style, and electrical specifications.

What voltage does the pump require?
The pump operates on standard 115V residential power.