The Caleffi NA10038 is a Grundfos UPS 15-58U replacement circulator pump, the three-speed 115 V wet-rotor circulator fitted to Caleffi 172-series thermostatic manifold mixing stations and HydroMixer units.
Product data compiled from Caleffi North America technical documentation (01170 NA, 01155 NA). Last reviewed July 2026.
Key Features
Grundfos UPS 15-58U
The three-speed cast-iron wet-rotor circulator fitted as standard to Caleffi 172-series mixing stations (115 V / 60 Hz, IP44).
Three Selectable Speeds
Match circulator output to zone head and flow by selecting one of three speeds.
Direct Drop-In
Same 6-1/2 in port-to-port centers and 1-1/2 in pump connections as the factory-fitted unit.
Proven Wet-Rotor Design
Maintenance-free, water-lubricated circulator for closed hydronic systems.
Technical Data
| Function | Manifold / mixing station service part |
|---|---|
| Pump | Grundfos UPS 15-58U, three-speed |
| Electric supply | 115 V - 60 Hz |
| Protection class | IP 44 |
| Pump connections | 1-1/2 in, 6-1/2 in center distance |
| Application | Replacement for 172-series mixing stations and HydroMixer units |
Documentation
Instruction sheetRelated Products
Frequently Asked Questions
It is the Grundfos UPS 15-58U three-speed circulator fitted to Caleffi 172-series thermostatic manifold mixing stations and HydroMixer mixing units.
115 V / 60 Hz single phase, protection class IP44.
Yes - same 6-1/2 in center distance and 1-1/2 in pump connections as the factory-fitted circulator.
- Type:
- Accessory