The 59896781 from Grundfos is a UPS15-55SUC  3-Speed Stainless Steel Circulator Pump, 1/8HP with removable Integral Check Valve and GU125 union connections (1-1/4"). Both stainless steel housing and 3 speeds of the Grundfos UPS15-55SUC model make it suitable for a wide range of applications such as radiant heating, solar, domestic water recirculation, storage tanks, chilled water cooling and many others.

 
Features:

• Ceramic shaft and radial bearings;
• Carbon axial bearing;
• Stainless steel rotor can and bearing plate;
• Corrosion-resistant impeller, Composite, PES;
• Stainless steelpump housing;
• Check valve;
• Union connection;
   

Technical Specifications:

• Speed Number: 3;
• Max flow: 25.1 US gpm;
• Head max: 18 ft;
• Liquid temperature range: 35.6 .. 230 F;
• Maximum operating pressure: 145 psi;
• Approvals on nameplate: UL, CSA;
• Pump housing: Stainless steel;
• Pump housing: DIN W.-Nr. 1.4301;
• Pump housing: AISI 304;
• Impeller: Composite, PES;
• Maximum ambient temperature: 104 F;
• Ambient max at 176 F liquid: 176 F;
• Maximum operating pressure: 145 psi;
• Flange standard: USA Threaded;
• Type of connection: S.S. Union;
• Pipe connection: 1 1/4" NPSM (GU125 Union);
• Pressure stage: 10;
• Port-to-port length: 5.87";
• Number of poles: 2;
• Power input in speed 1: 56 W;
• Power input in speed 2: 74 W;
• Max. power input: 87 W;
• Rated power in speed 1: 1/8HP;
• Rated power in speed 2: 1/10HP;
• Rated power in speed 3: 1/12HP;
• Main frequency: 60 Hz;
• Voltage: 115V;
• Current in speed 1: 0.31 A;
• Current in speed 2: 0.66 A;
• Current in speed 3: 0.69 A;
• Capacitor size - run: 10 mF/180 V;
• Insulation class (IEC 85): F;
• Gross weight: 5.4 lb;
   

Manufacturer's warranty:

• 2 years from date of installation.