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1 1/4 union, 3 speed, and check valve.

Think Stainless.

Choosing a stainless steel circulator ensures that you will always have the right pump - whether it is an open or closed system. Grundfos offers three stainless steel models, including two that feature our 3-speed SuperBrute technology.


  • Perfect for hot water recirculation applications
  • Stainless steel - Protects against corrosive fluids
  • Available in standard union or two-bolt flange
  • 3-speed SuperBrute technology available
  • Timer and line-cord options available
  • Integrated, removable check valve
  • Quick connect terminals - for easy installation
  • Highest starting torque in its class
  • Industry leading three-year warranty

Product name UPS 15-55 SUC
Product No. 59896781
EAN 5700837428125
Speed Number 3
Rated flow 11.1 US gpm
Max flow 25.1 US gpm
Rated head 8.042 ft
Maximum head 18.05 ft
Approvals UL, CSA
Y = pump with built-in isolating and non-return valves pump with built-in isolating and non-return valves
Pump housing Stainless steel
AISI 304
EN 1.4308
Impeller Composite
PES+30% GF
t max amb 104 °F
Ambient max at 176°F liquid 176 °F
Maximum operating pressure 145.04 psi
Type of connection NPSM
S.S. Union
Pipe connection 1 1/4" NPSM
Pressure rating for connection PN 10
Port-to-port length 5 15/16 in
Pumped liquid Water
Liquid temperature range 35.6 .. 230 °F
Selected liquid temperature 140 °F
Density 61.35 lb/ft³
Electrical data
Power input in speed 1 0.0778 HP
Power input in speed 2 77 W
Max. power input 87 W
Main frequency 60 Hz
Rated voltage 1 x 115 V
Current in speed 1 0.53 A
Current in speed 2 0.69 A
Current in speed 3 0.75 A
Capacitor size - run 10 µF/180 V
Number of poles 2
Insulation class (IEC 85) F
Built-in motor protection CONTACT
Thermal protec Impedance protected
Terminal box position 9H

Net weight 4.94 lb
Gross weight 5.79 lb

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