Product Overview
The Grundfos UP 15-29 SU model 59896775 is a single-speed stainless steel wet-rotor circulator for compatible water-circulation systems that require corrosion-resistant pump construction. It is commonly selected for properly designed domestic hot-water recirculation loops and other water applications where the pump materials, temperature range, pressure rating, and hydraulic performance match the system. The compact in-line design uses stainless steel union connections for installation and future service.
The confirmed pump data lists a rated flow of 10.3 GPM, maximum flow of 20.7 GPM, rated head of 5.322 ft, and maximum head of 9.843 ft. These values occur at different points on the performance curve. Correct selection requires the system’s required flow at calculated head loss, including pipe length, diameter, fittings, valves, elevation effects, and heat-source requirements.
This model operates on 115V single-phase power and has a confirmed maximum input of 87W. Union fittings are selected separately unless specifically included elsewhere in the order. This product identifies Grundfos 59896127 as a replacement reference; confirm connection style, hydraulic duty, and electrical requirements before substitution.
Key Features:
- Single-speed stainless steel circulator pump
- Wet-rotor, maintenance-free operating design
- 115V single-phase power
- 1-1/4 in. NPSM stainless steel union connection
- Impedance-protected motor
- Suitable for continuous circulation when correctly sized and installed
Common Uses:
- Compatible domestic hot-water recirculation loops
- Residential water-circulation systems
- Replacement of a matching stainless steel union circulator
- Applications requiring the confirmed flow and head range
Technical Specifications:
- Model: UP 15-29 SU
- Product Number: 59896775
- Speed Settings: One
- Voltage: 115V, 60 Hz
- Maximum Power Input: 87W
- Current: 0.75A
- Rated Flow: 10.3 GPM
- Maximum Flow: 20.7 GPM
- Rated Head: 5.322 ft
- Maximum Head: 9.843 ft
- Connection: 1-1/4 in. NPSM stainless steel union
- Port-to-Port Length: 5-15/16 in.
- Maximum Operating Pressure: 145.04 PSI
- Liquid Temperature Range: 35.6-203°F
- Approvals: UL and CSA
Dimensions and Weight:
- Net Weight: 4.82 lb
- Gross Weight: 5.69 lb
Installation and Sizing Notes:
Compare the system flow and head-loss calculation with the pump curve. Confirm union compatibility, water temperature, system pressure, electrical supply, pump orientation, air removal, and check-valve requirements. Follow the linked Grundfos specification sheet and installation manual.
FAQ:
What is the confirmed maximum flow?
The confirmed maximum flow is 20.7 GPM at the applicable point on the pump curve.
What is the maximum liquid temperature?
The confirmed liquid-temperature range extends to 203°F.
Are the union fittings included?
The pump uses 1-1/4 in. NPSM stainless steel union connections; confirm whether the required mating union components are included or must be ordered separately.
What older product number is referenced?
Grundfos 59896127 is listed as a replacement reference; verify the complete application before substitution.
Why Buy From Big Frog Supply?
Big Frog Supply selected this From the Frog product for customers comparing compact stainless steel circulators. We provide clear technical information, helpful support, and convenient online ordering for hot-water circulation systems.
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