Grundfos 52722513 UPS 26-99 FC 230V Cast Iron Circulator Pump

Product Overview

The Grundfos UPS 26-99 FC (Model 52722513) is a heavy-duty, three-speed cast iron circulator pump engineered for large hydronic heating systems and long distribution loops. Running on 230V power, it delivers up to 33 GPM and 28.87 ft of head. With ceramic bearings, a composite PES impeller, stainless steel rotor can, and built-in service valves, this pump offers reliable, quiet, and long-lasting operation for residential and light commercial heating applications.

Features & Benefits

• Three-speed operation delivering up to 33 GPM
• 230V single-phase motor for high-demand systems
• Cast iron EN-JL1030 (ASTM 30B) pump housing
• Ceramic shaft and radial bearings for durability
• Carbon axial bearing for smooth performance
• PES composite impeller for corrosion resistance
• Built-in isolating and non-return valves
• Stainless steel rotor can and bearing plate
• Internal thermal motor protection

Specifications

Technical Performance
Speed settings: 3
Maximum flow: 33 US GPM
Maximum head: 28.87 ft
Approvals: UL, CSA
Valve: Built-in isolating & non-return valves

Materials
Pump housing: Cast iron (EN-JL1030 / ASTM 30B)
Impeller: Composite PES
Bearings: Ceramic shaft and radial bearings, carbon axial bearing
Rotor can & bearing plate: Stainless steel

Installation Details
Maximum ambient temperature: 104°F
Ambient max at 176°F liquid: 176°F
Maximum operating pressure: 145.04 psi
Connection type: Cast iron flange, 2-bolt
Flange standard: USA Oval
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 temperature: 140°F
Liquid density: 61.35 lb/ft³

Electrical Data
Voltage: 230V single phase
Frequency: 60 Hz
Max power input: 196 W
Current: 0.7 A / 0.8 A / 0.9 A
Capacitor: 5 µF / 400 V
Poles: 2
Insulation class: F
Motor protection: Internal thermal

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

Installation Tips

• Ensure 230V wiring is correctly installed and grounded.
• Install with motor shaft horizontally.
• Flush heating loops before installation.
• Use built-in isolation valves for easier service.
• Choose speed settings based on flow requirements.

Frequently Asked Questions

Is this model suitable for high-temperature systems?
Yes, it is rated for water temperatures up to 230°F.

Does the pump include built-in valves?
Yes, it includes an isolating valve and a non-return valve.

Can this replace older UPS 26-99 pumps?
Yes, dimensions and performance match prior versions.

Is this safe for potable water?
No—this cast iron pump is for closed hydronic systems only.