Why it matters
The UPS15-58FC is a three-speed cast iron circulator: 1/25 HP, 0 to 17 GPM and 0 to 19.5 ft of head. Three speeds let one pump suit different loop sizes.
It handles 36 to 230 F at up to 145 psi system pressure and comes with rubber gaskets.
Who it's for, and who should skip it
Good fit if
- Boiler loops
- Radiant floors
- Replacing fixed-speed pumps
Look elsewhere if
- Potable water
- Variable-speed needs
Pros and cons
Pros
- Three speeds
- 17 GPM
- Gaskets included
Cons
- Closed loops only
- Flanges extra
- Fixed speeds
Limitations to weigh
- Circulators are sized to the heating loop; match the replacement to the old pump's flange size and speed setting.
- Cast iron circulators are for closed heating loops, not drinking water.
Specifications
Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.
| Material | Cast Iron | Retailer |
|---|---|---|
| Dimensions (seller) | 8"L x 8"W x 8"H | Retailer |
| Product weight | 3.13 kg | Retailer |
| Max flow (maker) | 17 GPM | Retailer |
| Max head / lift (maker) | 19.5 ft | Retailer |
| Voltage | 115 V | Retailer |
| Model number | UPS15-58FC | Retailer |
| Horsepower | 1/25 HP | Retailer |
| Housing | Cast Iron | Retailer |
Alternatives worth comparing
More booster & recirculation pumps we cover
- ZeroPone 93 W Recirculating Pump
- VEVOR 93 W Recirculating Pump
- AB 25PBG-7 Circulation Pump
- Grundfos Comfort System 595916 Recirculation Pump
All booster & recirculation pumps, compared in one table · Every Grundfos product we cover
Final verdict
A flexible, reliable circulator.
Where to buy
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Questions buyers ask
What's the flow range?
0 to 17 GPM.
What's the head range?
0 to 19.5 ft.