Grundfos 98961763 UPS 26-99 SFC Stainless Steel Circulator Pump

Product Overview

The Grundfos UPS 26-99 SFC (Model 98961763) is a high-performance stainless steel circulator pump engineered for residential and light commercial hydronic applications. With its stainless steel housing, ceramic bearings, and reliable three-speed motor, this pump delivers excellent corrosion resistance, quiet operation, and dependable water circulation in potable and closed-loop systems.

Features & Benefits

• Three-speed circulator for customizable system performance
• Stainless steel housing ideal for potable water and corrosive environments
• Built-in isolating and non-return valves for easier installation and service
• Ceramic shaft and radial bearings for long service life
• Carbon axial bearing for smooth, quiet operation
• PES composite impeller for durability and mineral resistance
• Internal thermal motor protection
• Suitable for potable hot water recirculation
• High-flow and high-head capability for demanding heating systems

Specifications

Technical Performance
Speed settings: 3
Maximum flow: 33 US GPM
Maximum head: 28.87 ft
Voltage: 115 V, 60 Hz
Max power input: 197 W
Insulation class: F
Approvals: UL, CSA
Motor protection: Internal thermal
Capacitor: 20 µF / 180 V

Construction Materials
Pump housing: Stainless steel (EN 1.4301)
Impeller: Composite PES
Bearings: Ceramic shaft and radial bearings, carbon axial bearing
Rotor can and bearing plate: Stainless steel

Installation Details
Max ambient temperature: 104°F
Maximum operating pressure: 145.04 psi
Connection type: 2-bolt stainless steel flange
Flange standard: USA oval
Pressure stage: PN 10
Port-to-port length: 6 1/2 in

Liquid Characteristics
Media: Water
Temperature range: 35.6°F – 230°F
Selected operating temperature: 140°F
Liquid density: 61.35 lb/ft³

Electrical Performance (By Speed)
Speed 1: 0.2012 HP, 1.3 A
Speed 2: 179 W, 1.5 A
Speed 3: 197 W, 1.8 A

General Information
Gross weight: 10.3 lb
Country of origin: USA
HTS code: 8413.70.00.21

Installation Tips

• Use stainless steel ciruclators for potable or corrosive water environments.
• Install horizontally to ensure smooth bearing lubrication.
• Use built-in isolation valves for quick service without draining the system.
• Select appropriate speed after startup to optimize flow and efficiency.
• Ensure correct flange alignment to avoid leaks or vibration.

Frequently Asked Questions

Is the UPS 26-99 SFC safe for potable water?
Yes. The stainless steel housing is suitable for drinking-water applications.

Can this replace a cast iron Grundfos 26-99?
Yes. The flange spacing and electrical specs match standard 26-99 models.

When should stainless steel be used?
In potable water systems or where water quality causes corrosion.

Does it include isolation valves?
Yes. It includes both an isolating valve and a non-return valve.

What systems is it best suited for?
Hydronic heating loops, potable water recirculation, and corrosion-sensitive applications.