Description
The Grundfos 98126835 (MAGNA1 40-180 F) is a Circulator Pump — ECM Variable Speed. MAGNA1 series ECM circulator with AUTOADAPT for heating and cooling systems. Rated 208-230V, 1-Phase, 60 Hz. Applications include HVAC: Heating, HVAC: Air Conditioning, District heating and more.
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.
Contact for Availability
Parts availability varies. Contact PumpStop to confirm stock, lead time, and pricing before placing an order.
| Model Number | 98126835 |
| Product Series | MAGNA1 |
| Series Description | Circulator Pump — ECM Variable Speed |
| Voltage | 208-230V |
| Phase | 1-Phase |
| Frequency | 60 Hz |
| Insulation Class | F |
| Protection Class (IP) | IPX4D |
| Max Operating Pressure | 174.05psi |
| Max Fluid Temperature | 230°F |
| Max Ambient Temperature | 104°F |
| Nominal Pipe Bore | GF15/26/40/43 |
| Pipe Pressure Rating | PN 12 |
| Pipe Standard | GF |
| Impeller Material | Composite |
| Housing Material | Cast iron |
| Approvals / Certifications | cETLus, Proposition 65 |
| Electrical | Verify supply voltage, phase, and frequency match nameplate before installation: 208-230V, 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. MAGNA1 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
- Connection
- PN 12
- Density
- 61.35 lb/ft³
- Enclosure class (IEC 34-5)
- X4D
- Energy (EEI)
- 0.18
- Flange standard
- GF
- Frequency
- 60 Hz
- Gross weight
- 33.7 lb
- Housing
- Cast iron
- I MAX
- 2.72A
- Impeller
- Composite
- Insulation
- F
- Insulation class (IEC 85)
- F
- IP Class
- X4D
- Length
- 8 9/16 in
- Liquid max temp
- 230°F
- Liquid temperature range
- 14 .. 230 °F
- Maximum current consumption
- 2.72 A
- Maximum head
- 59.06 ft
- Maximum operating pressure
- 174.05 psi
- Minimum current consumption
- 0.18 A
- Model
- B
- n rpm
- F
- Net weight
- 30.4 lb
- Phase
- 1
- Pipe connection
- GF15/26/40/43
- Power input - P1
- 17 .. 614 W
- Pressure rating for connection
- PN 12
- Pump housing
- Cast iron
- Pumped liquid
- Water
- Range of ambient temperature
- 32 .. 104 °F
- Rated voltage
- 1 x 208-230 V
- Selected liquid temperature
- 140 °F
- Standard
- GF
- TF class
- 110
Dimensional Drawing
Wiring Diagram
OPTIMIZED INDUSTRIAL SOLUTIONS (Product brochure)
DBS, GRUNDFOS RESIDENTIAL BUILDINGS (Product brochure)
MAGNA 1 and MAGNA 3 (Addendum to Safety Instructions) (Installation and operating instructions)
MAGNA1 (US version) (Installation and operating instructions)
MAGNA, MAGNA1, MAGNA3, MAGNA3 D, MAGNA3 N (Service Kit Catalogue)
MAGNA1, MAGNA3, Terminal connected versions, Pump head, clamp, O-ring, (Service kit instruction)
MAGNA1, MAGNA3 Terminal connected versions, Front cover (Service kit instruction)
MAGNA1, MAGNA3 (Terminal-connected versions / Control box) (Service kit instruction)