Grundfos 506172 Replacement Cartridge Assembly for UP15-18SU/SF Circulator Pump 115V

The Grundfos 506172 is a genuine OEM replacement cartridge assembly designed specifically for Grundfos UP15-18SU and UP15-18SF series circulator pumps operating on 115-volt power. This complete cartridge assembly provides a cost-effective alternative to replacing the entire pump unit when the motor or internal components fail.

Key Features:

• Direct replacement cartridge for UP15-18SU/SF circulator pumps
• 115-volt motor assembly with factory-installed impeller and seals
• Genuine Grundfos OEM part ensuring proper fit and performance
• Includes complete motor, rotor, and bearing assembly
• Simplifies pump maintenance by allowing cartridge replacement instead of full pump replacement
• Designed for hydronic heating, radiant floor heating, and hot water recirculation systems

This cartridge assembly allows technicians and installers to restore pump performance quickly without the need to replace piping connections or the pump housing. The factory-assembled unit ensures all internal clearances and alignments meet Grundfos specifications for reliable, quiet operation.