Grundfos 52722512 UPS26-99FC 3-Speed 1/6 HP Circulator Pump with Integral Flow Check

The Grundfos UPS26-99FC is a cast iron, three-speed circulator pump designed for efficient operation in residential and light commercial hydronic heating systems. This 1/6 horsepower pump features an integrated flow check valve to prevent reverse flow and gravity circulation when the pump is off, making it ideal for primary/secondary piping applications and radiant heating systems.

Key Features:

• Three manual speed settings for precise flow control and system balancing
• Built-in flow check valve prevents thermosiphoning and reverse flow
• Cast iron construction provides durability and excellent heat dissipation
• 1/6 HP permanent split capacitor motor for reliable performance
• 115V single-phase power supply with integral cord and plug
• 1-inch NPT sweat connections for standard residential installation
• Serviceable cartridge design allows for easy maintenance without removing pump from piping
• Maximum flow rate of 30 GPM with head capability up to 24 feet depending on speed setting
• Bronze impeller and stainless steel shaft resist corrosion
• Suitable for closed-loop systems with water or glycol mixtures up to 50%

This circulator pump is engineered for quiet operation and long service life in hydronic heating applications including baseboard systems, radiant floor heating, panel radiators, and fan coil units. The three-speed motor allows installers to match pump performance to system requirements, reducing energy consumption while ensuring proper heat distribution.