Grundfos 59896781 Stainless Steel Circulator Pump - UPS15-55SUC 3-Speed 1/8HP 115V

The Grundfos UPS15-55SUC is a professional-grade three-speed stainless steel circulator pump designed for versatile residential and light commercial hydronic applications. With a corrosion-resistant stainless steel housing and powerful 1/8 HP motor, this pump delivers reliable performance across a wide range of heating and cooling systems.

Key Features:

• Three adjustable speeds (Low/Med/High) with SuperBrute technology for optimal system matching and energy efficiency
• Corrosion-free stainless steel pump housing (AISI 304, DIN W.-Nr. 1.4301) ideal for domestic hot water recirculation
• Removable Integral Flow Check (IFC) valve prevents backflow without requiring separate check valve installation
• 1-1/4" NPSM stainless steel union connections (GU125) for easy installation and servicing
• Composite PES impeller with ceramic shaft and radial bearings for long-lasting durability
• Maximum flow rate of 25.1 GPM with 18 feet maximum head
• Operates on 115V with power input ranging from 56W to 87W depending on speed setting
• Handles liquid temperatures from 35.6°F to 230°F with maximum operating pressure of 145 PSI
• Compact port-to-port length of just 5.87 inches
• UL and CSA approved with canned rotor design for maintenance-free, quiet operation

Applications: Ideal for radiant floor heating systems, solar thermal systems, domestic hot water recirculation, storage tanks, hydronic heating, chilled water cooling, and underfloor heating installations. The self-lubricating bearings eliminate the need for routine maintenance, while the impedance-protected motor ensures reliable operation in demanding applications.