Description
The Grundfos 59545520 (UP 25-50 KU 180) is a Circulator Pump — Single Speed. Single-speed circulator for domestic heating systems. Maintenance-free permanently lubricated bearings. Rated 230V, 1-Phase, 50 Hz. Applications include HVAC: Heating, Residential heating, Residential 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.
Contact for Availability
Parts availability varies. Contact PumpStop to confirm stock, lead time, and pricing before placing an order.
| Model Number | 59545520 |
| Product Series | UP |
| Series Description | Circulator Pump — Single Speed |
| Voltage | 230V |
| Phase | 1-Phase |
| Frequency | 50 Hz |
| Insulation Class | F |
| Protection Class (IP) | IP54 |
| Max Operating Pressure | 145.04psi |
| Max Fluid Temperature | 203°F |
| Max Ambient Temperature | 176°F |
| Nominal Pipe Bore | G 1 1/2inch |
| Pipe Pressure Rating | PN 10 |
| Impeller Material | Composite, PES/PP |
| Housing Material | Cast iron |
| Approvals / Certifications | CE |
| Electrical | Verify supply voltage, phase, and frequency match nameplate before installation: 230V, 1-Phase, 50 Hz. |
| Temperature limits | Do not exceed max fluid temperature 203°F or max ambient temperature 176°F. Exceeding limits damages seals and motor insulation. |
| Dry running | Do not run dry. UP 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. |
- EAN
- 5700390570088
- Approvals
- CE
- Built-in motor protection
- NONE
- Capacitor size - run
- 2.5 µF
- Connection
- PN 10
- Density
- 61.35 lb/ft³
- Enclosure class (IEC 34-5)
- IP54
- Gross weight
- 6.17 lb
- Housing
- Cast iron
- Impeller
- Composite
- Insulation class (IEC 85)
- F
- Length
- 180 mm
- Liquid temperature range
- -13 .. 203 °F
- Mains frequency
- 50 Hz
- Material Pricing Group
- 51
- Maximum ambient temperature
- 176 °F
- Maximum head
- 16.4 ft
- Maximum operating pressure
- 10 bar
- Net weight
- 5.73 lb
- Pressure rating for connection
- PN 10
- Pump housing
- Cast iron
- Pumped liquid
- Water
- Rated voltage
- 1 x 230 V
- Real Time
- Delivery date to be confirmed on Sales Order Update with real time availability and Net price
- Selected liquid temperature
- 140 °F
- Size of connection
- G 1 1/2 inch
- Speed no
- 1
- Terminal box
- filled terminal box
- Terminal box position
- 9H
- TF class
- 95
- Thermal protec
- Impedance protected
Dimensional Drawing
Wiring Diagram