Description
The Grundfos 59896781 (UPS 15-55 SUC) is a Circulator Pump — Three Speed. Three-speed circulator for heating, air-conditioning, and domestic hot water recirculation. Nominal performance: 11.1US gpm at 8.042ft. Rated 115V, 1-Phase, 60 Hz. Applications include 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.
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Parts availability varies. Contact PumpStop to confirm stock, lead time, and pricing before placing an order.
| Model Number | 59896781 |
| Product Series | UPS |
| Series Description | Circulator Pump — Three Speed |
| Voltage | 115V |
| Phase | 1-Phase |
| Frequency | 60 Hz |
| Motor Protection | Contact |
| Insulation Class | F |
| Nominal Flow | 11.1US gpm |
| Nominal Head | 8.042ft |
| Max Operating Pressure | 145.04psi |
| Max Fluid Temperature | 203°F |
| Max Ambient Temperature | 104°F |
| Nominal Pipe Bore | 1 1/4" NPSM |
| Pipe Pressure Rating | PN 10 |
| Pipe Standard | 1 1/4" NPSM |
| Impeller Material | Composite |
| Housing Material | Stainless steel |
| Approvals / Certifications | UL, CSA |
| Electrical | Verify supply voltage, phase, and frequency match nameplate before installation: 115V, 1-Phase, 60 Hz. |
| Temperature limits | Do not exceed max fluid temperature 203°F or max ambient temperature 104°F. Exceeding limits damages seals and motor insulation. |
| Dry running | Do not run dry. UPS 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
- UL, CSA
- Built-in motor protection
- CONTACT
- Capacitor size - run
- 10 µF/180 V
- Connection
- PN 10
- Current in speed 1
- 0.53 A
- Current in speed 2
- 0.69 A
- Current in speed 3
- 0.75 A
- Density
- 61.35 lb/ft³
- Frequency
- 60 Hz
- Gross weight
- 5.79 lb
- Housing
- Stainless steel
- Impeller
- Composite
- Insulation
- F
- Insulation class (IEC 85)
- F
- Length
- 5 15/16 in
- Liquid max temp
- 230°F
- Liquid temperature range
- 35.6 .. 230 °F
- Max flow
- 25.1 US gpm
- Max. power input
- 87 W
- Maximum ambient temperature
- 104 °F
- Maximum head
- 18.05 ft
- Maximum operating pressure
- 145.04 psi
- n rpm
- F
- Net weight
- 4.94 lb
- Number of poles
- 2
- Phase
- 1
- Pipe connection
- 1 1/4" NPSM
- Power input in speed 2
- 77 W
- Pressure rating for connection
- PN 10
- Pump housing
- Stainless steel
- Pumped liquid
- Water
- Rated flow
- 11.1 US gpm
- Rated head
- 8.042 ft
- Rated voltage
- 1 x 115 V
- Return valve
- Product name:UPS 15-55 SUC
- Selected liquid temperature
- 140 °F
- Terminal box position
- 9H
- Thermal protec
- Impedance protected
- Type of connection
- NPSM
Dimensional Drawing
Wiring Diagram
UPS, 3-SPEED TECHNOLOGY (Product brochure)
DBS, GRUNDFOS RESIDENTIAL BUILDINGS (Product brochure)
Get It All with Grundfos Plumbing, ONE PARTNER ALL the PUMPS (Product brochure)
UP Series circulators® (Installation and operating instructions)
Dielectric Isolation Valve (Installation and operating instructions)
UP Series, Circulator pumps (Data booklet)
GRUNDFOS UP 10-16 SERIES, Hot Water Recirculation Pump (Data sheet)