
Grundfos 59896781 Pump
The Grundfos 59896781 (Model UPS15-55SUC) is a high-performance 3-speed stainless steel circulator pump engineered for precision in open and closed-loop systems. Built for the rigors of domestic hot water recirculation and radiant heating, this 1/12 HP wet-rotor circulator features a canned rotor design, eliminating the need for shaft seals and ensuring leak-free performance. The stainless steel pump housing provides critical corrosion resistance for potable water applications, while the 1-1/4 inch GU125 union connections simplify in-line installation. With SuperBrute technology, technicians can toggle between three speeds—reaching a maximum flow of 25.1 GPM and a max head of 18 feet—to match specific system requirements and optimize energy consumption. The lead-free construction and chemical compatibility make it a reliable choice for solar heating, chilled water cooling, and underfloor hydronic systems. This unit operates at 115V and handles liquid temperatures up to 230°F, delivering the quiet, maintenance-free operation expected from industry-standard Grundfos engineering.
- Corrosion-Resistant Housing: High-grade stainless steel construction ensures compatibility with potable water systems and prevents rust.
- Variable Speed Control: Three selectable motor speeds allow for precise system balancing and energy-efficient operation.
- Quiet Wet-Rotor Design: The integrated motor and pump unit operates with minimal noise, ideal for residential indoor installations.
- High Thermal Capacity: Rated for liquid temperatures ranging from 36°F to 230°F, supporting both heating and cooling loops.
- Simple Field Service: Features union-style connections and an internal check valve for streamlined installation and maintenance.
Common Questions
Is the Grundfos UPS15-55SUC suitable for potable water?
Yes, the stainless steel housing is specifically designed for potable water circulation and domestic hot water systems, meeting lead-free requirements.
What is the difference between the SUC and SFC models?
The SUC model uses union connections (threaded), typically for potable water, while SFC models use bolted flanges and are often cast iron for closed-loop hydronic heating.
Does this pump include the union fittings?
Standard packaging usually includes the pump with GU125 threads; however, the actual union tailpieces (3/4" or 1/2" ends) are typically sold separately depending on your pipe size.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $686.58
-65%$686.58
$240.30Grundfos 59896781 Pump
The Grundfos 59896781 (Model UPS15-55SUC) is a high-performance 3-speed stainless steel circulator pump engineered for precision in open and closed-loop systems. Built for the rigors of domestic hot water recirculation and radiant heating, this 1/12 HP wet-rotor circulator features a canned rotor design, eliminating the need for shaft seals and ensuring leak-free performance. The stainless steel pump housing provides critical corrosion resistance for potable water applications, while the 1-1/4 inch GU125 union connections simplify in-line installation. With SuperBrute technology, technicians can toggle between three speeds—reaching a maximum flow of 25.1 GPM and a max head of 18 feet—to match specific system requirements and optimize energy consumption. The lead-free construction and chemical compatibility make it a reliable choice for solar heating, chilled water cooling, and underfloor hydronic systems. This unit operates at 115V and handles liquid temperatures up to 230°F, delivering the quiet, maintenance-free operation expected from industry-standard Grundfos engineering.
- Corrosion-Resistant Housing: High-grade stainless steel construction ensures compatibility with potable water systems and prevents rust.
- Variable Speed Control: Three selectable motor speeds allow for precise system balancing and energy-efficient operation.
- Quiet Wet-Rotor Design: The integrated motor and pump unit operates with minimal noise, ideal for residential indoor installations.
- High Thermal Capacity: Rated for liquid temperatures ranging from 36°F to 230°F, supporting both heating and cooling loops.
- Simple Field Service: Features union-style connections and an internal check valve for streamlined installation and maintenance.
Common Questions
Is the Grundfos UPS15-55SUC suitable for potable water?
Yes, the stainless steel housing is specifically designed for potable water circulation and domestic hot water systems, meeting lead-free requirements.
What is the difference between the SUC and SFC models?
The SUC model uses union connections (threaded), typically for potable water, while SFC models use bolted flanges and are often cast iron for closed-loop hydronic heating.
Does this pump include the union fittings?
Standard packaging usually includes the pump with GU125 threads; however, the actual union tailpieces (3/4" or 1/2" ends) are typically sold separately depending on your pipe size.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Product Information
Product Information
Shipping & Returns
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Description
The Grundfos 59896781 (Model UPS15-55SUC) is a high-performance 3-speed stainless steel circulator pump engineered for precision in open and closed-loop systems. Built for the rigors of domestic hot water recirculation and radiant heating, this 1/12 HP wet-rotor circulator features a canned rotor design, eliminating the need for shaft seals and ensuring leak-free performance. The stainless steel pump housing provides critical corrosion resistance for potable water applications, while the 1-1/4 inch GU125 union connections simplify in-line installation. With SuperBrute technology, technicians can toggle between three speeds—reaching a maximum flow of 25.1 GPM and a max head of 18 feet—to match specific system requirements and optimize energy consumption. The lead-free construction and chemical compatibility make it a reliable choice for solar heating, chilled water cooling, and underfloor hydronic systems. This unit operates at 115V and handles liquid temperatures up to 230°F, delivering the quiet, maintenance-free operation expected from industry-standard Grundfos engineering.
- Corrosion-Resistant Housing: High-grade stainless steel construction ensures compatibility with potable water systems and prevents rust.
- Variable Speed Control: Three selectable motor speeds allow for precise system balancing and energy-efficient operation.
- Quiet Wet-Rotor Design: The integrated motor and pump unit operates with minimal noise, ideal for residential indoor installations.
- High Thermal Capacity: Rated for liquid temperatures ranging from 36°F to 230°F, supporting both heating and cooling loops.
- Simple Field Service: Features union-style connections and an internal check valve for streamlined installation and maintenance.
Common Questions
Is the Grundfos UPS15-55SUC suitable for potable water?
Yes, the stainless steel housing is specifically designed for potable water circulation and domestic hot water systems, meeting lead-free requirements.
What is the difference between the SUC and SFC models?
The SUC model uses union connections (threaded), typically for potable water, while SFC models use bolted flanges and are often cast iron for closed-loop hydronic heating.
Does this pump include the union fittings?
Standard packaging usually includes the pump with GU125 threads; however, the actual union tailpieces (3/4" or 1/2" ends) are typically sold separately depending on your pipe size.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.












