Description
The Grundfos 98126814 (MAGNA3 50-80 F N) is a Circulator Pump — ECM Variable Speed. MAGNA3 series high-efficiency ECM circulator with AUTOADAPT and FLOWADAPT functions. Nominal performance: 68.2US gpm at 15.75ft. Rated 115V, 1-Phase, 60 Hz. Applications include HVAC: Heating, Plumbing: Hot Water Recirculation.
Genuine Grundfos Part
OEM component engineered and manufactured to Grundfos specifications. Maintains pump performance and warranty coverage.
Full Traceability
Genuine Grundfos parts carry manufacturer traceability from production through delivery. No counterfeit risk.
Authorized Source
PumpStop is an authorized Grundfos distributor. All parts are genuine — not aftermarket, not surplus.
Confirm Compatibility
Always verify part number against your pump model number and serial number before ordering. Contact PumpStop for parts identification assistance.
Technical Support Available
PumpStop technical team can identify correct parts from pump nameplate data, serial number, or model code. Call (781) 281-8905 or chat.
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Parts availability varies. Contact PumpStop to confirm stock, lead time, and pricing before placing an order.
| Model Number | 98126814 |
| Product Series | MAGNA3 |
| Series Description | Circulator Pump — ECM Variable Speed |
| Voltage | 115V |
| Phase | 1-Phase |
| Frequency | 60 Hz |
| Insulation Class | F |
| Protection Class (IP) | IPX4D |
| Nominal Flow | 68.2US gpm |
| Nominal Head | 15.75ft |
| Max Operating Pressure | 174.05psi |
| Max Fluid Temperature | 230°F |
| Max Ambient Temperature | 104°F |
| Nominal Pipe Bore | GF53 |
| Pipe Pressure Rating | PN 12 |
| Pipe Standard | GF |
| Impeller Material | Composite |
| Housing Material | Stainless steel |
| Approvals / Certifications | cETLus, Proposition 65 |
| Electrical | Verify supply voltage, phase, and frequency match nameplate before installation: 115V, 1-Phase, 60 Hz. |
| Temperature limits | Do not exceed max fluid temperature 230°F or max ambient temperature 104°F. Exceeding limits damages seals and motor insulation. |
| Dry running | Do not run dry. MAGNA3 pumps use the pumped fluid to lubricate the shaft seal. Dry running destroys the seal within seconds. Install dry-run protection on all automatic installations. |
| Maintenance | Refer to the Grundfos Installation and Operating Manual (IOM) for correct installation, commissioning, and maintenance. Contact PumpStop for documentation. |
- Approvals
- cETLus, Proposition 65
- Approvals for drinking water
- NSF
- Connection
- PN 12
- Density
- 61.35 lb/ft³
- Enclosure class (IEC 34-5)
- X4D
- Energy (EEI)
- 0.19
- Flange standard
- GF
- Frequency
- 60 Hz
- Gross weight
- 47.1 lb
- Housing
- Stainless steel
- I MAX
- 3.09A
- Impeller
- Composite
- Insulation
- F
- Insulation class (IEC 85)
- F
- IP Class
- X4D
- Length
- 9 1/2 in
- Liquid max temp
- 230°F
- Liquid temperature range
- 14 .. 230 °F
- Maximum current consumption
- 3.09 A
- Maximum head
- 26.25 ft
- Maximum operating pressure
- 174.05 psi
- Minimum current consumption
- 0.31 A
- Model
- E
- n rpm
- F
- Net weight
- 42.5 lb
- Phase
- 1
- Pipe connection
- GF53
- Power input - P1
- 18.5 .. 341 W
- Pressure rating for connection
- PN 12
- Pump housing
- Stainless steel
- Pumped liquid
- Water
- Range of ambient temperature
- 32 .. 104 °F
- Rated flow
- 68.2 US gpm
- Rated head
- 15.75 ft
- Rated voltage
- 1 x 115 V
- Selected liquid temperature
- 140 °F
- Standard
- GF
- TF class
- 110
Dimensional Drawing
Wiring Diagram
MAGNA3, Terminal Connected (Quick Guide) - (US version)
MAGNA3 Model E, Medium and large (Quick Guide)
MAGNA3 Model E, Small (Quick Guide)
OPTIMIZED INDUSTRIAL SOLUTIONS (Product brochure)
MAGNA 1 and MAGNA 3 (Addendum to Safety Instructions) (Installation and operating instructions)