NBK-20940 – Circulator Pump, 115V, 1/25 HP, 3-Speed The NBK-20940 Circulator Pump is a dependable, high-efficiency pump built for outdoor boilers, radiant floor heating, and general hydronic heating systems. Designed for versatility, this model features three adjustable speeds to fine-tune water circulation, improve energy efficiency, and balance system performance. It serves as a direct replacement for popular Grundfos models, offering quiet, consistent operation and long-lasting reliability.Key Features:• 3-Speed Control – Easily adjustable to meet the precise circulation requirements of your heating system, ensuring optimal efficiency• Robust Construction – Built for continuous operation under demanding outdoor boiler conditions• Quiet, Smooth Performance – Reduces system noise while maintaining strong, consistent flow• Standard Flange Design – Fits seamlessly into standard system configurations for quick, easy replacementSpecifications:• SKU: 20940• Voltage: 115V• Horsepower: 1/25 HP• Speed Settings: 3-speed adjustable• Application: Outdoor boiler systems, radiant floor heating, and general hydronic heating systemsEquivalent Models:• Grundfos: UPS15-58FCWhy Choose the NBK-20940 Circulator Pump?The NBK-20940 provides outstanding flexibility and efficiency for residential or light commercial heating applications. Its three-speed motor allows for customizable flow control, helping reduce energy usage and optimize system performance. Compatible with Grundfos UPS15-58FC models, it ensures reliable operation, quiet performance, and extended service life—making it a smart choice for homeowners and professionals alike.

