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Grundfos UPS 26-99 FC High-Flow 3-Speed Circulator Pump with Built-In - $325 (GLENVIEW)
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The Grundfos UPS 26-99 FC (Part Number 52722512) is a heavy-duty, high-flow circulator pump engineered for hydronic heating systems and other closed-loop circulation applications. Featuring three adjustable speed settings, an integrated flow check valve, and a robust cast iron body, this pump delivers exceptional versatility, performance, and energy efficiency.
Rated for 1x115V operation at 60 Hz, this circulator is ideal for larger residential or light commercial systems. Its compact design (165 mm port-to-port) and 2-bolt flange connections make installation straightforward and compatible with most standard hydronic layouts. UL and CUL listed, the unit includes thermal overload protection and an internally mounted run capacitor.
🔧 Technical Specifications
Product Name: UPS 26-99 FC
Product Number: 52722512
EAN / UPC: 5700834818707
Rated Voltage: 1 x 115V
Frequency: 60 Hz
Speed Settings: 3
Power Input (Watts):
Speed 1: 150 W
Speed 2: 179 W
Speed 3: 197 W (max)
Amperage Draw:
Speed 1: 1.3 A
Speed 2: 1.5 A
Speed 3: 1.8 A
Rated Flow: 4.02 m³/h
Maximum Flow: 7.5 m³/h
Rated Head: 5.02 m
Maximum Head: 8.8 m
Run Capacitor: 20 µF / 180 V
Number of Poles: 2
Insulation Class: F
Thermal Protection: Internal
Ex-Protection Standard: CONTACT
Terminal Box Position: 9H
⚙️ Construction Details
Pump Housing Material: Cast Iron (EN-GJL-200 / ASTM A48-30B)
Impeller Material: PES + 30% Glass Fiber (Composite)
Connection Type: 2-Bolt Flange
Flange Pressure Rating: PN 10
Port-to-Port Length: 165 mm (approx. 6.5 in)
Net Weight: 4.3 kg (9.5 lbs)
Gross Weight: 4.64 kg
🌡️ Operational Conditions
Ambient Temp Range: 2°C to 40°C
Max Ambient Temp (with 80°C liquid): 80°C
Liquid Temp Range: 2°C to 110°C
Selected Liquid Temp: 60°C
Max Operating Pressure: 10 bar
Pumped Media: Water (or water/glycol mixtures as allowed by Grundfos)
Media Density (at 60°C): 983.2 kg/m³
✅ Features
3-speed control for custom flow performance
Integrated flow check valve (FC) for simplified installation and backflow prevention
Quiet operation with internal thermal protection
Low-maintenance and energy efficient PSC motor design
Cast iron construction for durability and longevity
Standard 2-bolt flange mounting
Designed for closed-loop hydronic heating and cooling systems
UL / CUL listed
Compatible with common installation brackets and flange kits
🧩 Applications
Residential and commercial hydronic heating systems
Radiant floor heating loops
Baseboard and panel radiator systems
Hot water recirculation
Geothermal loop systems
Solar thermal systems (closed-loop)
🔁 Cross-Referenced / Equivalent Models
Grundfos UPS26-99FC (identical variant; label format difference)
Taco 0014-F1 (similar flow and head range – confirm flange and control specs)
Bell & Gossett NRF-36 (similar duty point, variable-speed options)
Armstrong Astro 250CI (heavy-duty 3-speed circulation)
⚠️ Always verify flow/head requirements, flange dimensions, voltage, and wiring before substitution.
🔧 Assembly/Install Notes
Ships with pre-mounted terminal box
Use compatible 2-bolt flange sets
Recommended to pair with dielectric unions on mixed-metal systems
Pump must be installed with shaft horizontal for proper bearing lubrication
System should be flushed prior to startup to avoid impeller fouling
📌 Related
grundfos ups 26-99 fc 3 speed circulator
115v cast iron heating pump
grundfos hydronic pump with flow check
52722512 grundfos cast iron pump
boiler pump 3 speed 1/6 hp
ups26-99fc circulator with flange
📈 Common Requests:
“Does this pump include a flow check?” → Yes, built-in.
“Can this be used in radiant heating?” → Yes, ideal for radiant loops.
“Is it variable-speed or 3-speed manual?” → Manual 3-speed selection.
“What flange size is required?” → Standard 2-bolt hydronic flange.
“Can it handle glycol mixtures?” → Yes, if per Grundfos’ allowed ratios.