Grundfos 59896773 UPS 15-55 SFC Stainless Steel Circulator Pump

Product Overview

The Grundfos UPS 15-55 SFC is a stainless steel circulator pump engineered for domestic hot water recirculation and potable water applications. With a corrosion-resistant AISI 304 stainless steel housing, three-speed motor, and durable ceramic bearings, this circulator provides reliable and efficient performance. Built-in isolating and non-return valves simplify installation and maintenance, making it ideal for residential and light commercial systems requiring dependable hot water circulation.

Features & Benefits

• Stainless steel AISI 304 housing for potable water use
• Three-speed motor for adjustable performance
• Ceramic shaft and radial bearings for long service life
• Carbon axial bearing for quiet operation
• Corrosion-resistant PES composite impeller
• Built-in isolating and non-return valves
• Smooth, quiet circulation for domestic hot water
• Internal thermal motor protection

Specifications

Technical Performance
Speed settings: 3
Maximum flow: 25.1 US GPM
Maximum head: 18.05 ft
Approvals: UL, CSA
Valve: Built-in isolating and non-return valves

Materials
Pump housing: Stainless steel (DIN 1.4301 / AISI 304)
Impeller: Composite PES
Bearings: Ceramic shaft and radial bearings, carbon axial bearing
Rotor can & bearing plate: Stainless steel

Installation Requirements
Maximum ambient temperature: 104°F
Ambient max at 176°F liquid: 176°F
Maximum operating pressure: 145.04 psi
Connection type: Stainless steel flange
Flange standard: USA Oval, 2-bolt
Pressure stage: PN 10
Port-to-port length: 6 1/2 in

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

Electrical Data
Power input (speed 1): 0.0778 HP
Power input (speed 2): 77 W
Max power input: 87 W
Voltage: 115 V
Frequency: 60 Hz
Current draw: 0.53 A / 0.69 A / 0.75 A
Capacitor: 10 µF / 180 V
Poles: 2
Insulation class: F
Motor protection: Internal thermal

General Information
Gross weight: 6 lb
Country of origin: USA
HTS code: 8413.70.00.21

Installation Tips

• Use stainless steel circulators for potable water or corrosive environments.
• Install with the motor shaft horizontal to ensure proper lubrication.
• Flush system piping before installation to prevent debris-related issues.
• Utilize built-in isolation valves for maintenance without draining the system.
• Select appropriate speed based on flow requirements and noise considerations.

Frequently Asked Questions

Is this pump suitable for potable water?
Yes, the stainless steel housing makes it fully suitable for domestic hot water recirculation.

Does it include a check valve?
Yes, the pump includes an integrated non-return valve and isolating valve.

What applications is it best used for?
Domestic hot water recirculation loops and potable water systems.

How many speeds does it have?
The pump includes three selectable speed settings.

Can this replace a cast iron UPS 15-55?
Yes, it matches the same dimensions and electrical specifications.