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.
Product data compiled from Caleffi North America technical documentation (01155 NA, NA10814, NA11011) and the Caleffi North America product catalogue. Last reviewed August 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.
Pump Only - No Fittings Included
Caleffi supplies this as the bare circulator for 172-series stations. Isolation valves, gaskets and unions are not included; reuse the existing fittings or order them separately.
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 (per NA10814, as fitted to 172-series stations) |
| Pump connections | 1-1/2 in, 6-1/2 in (165 mm) centre distance, as fitted to 172-series stations (per NA10814) |
| Application | Replacement for 172-series mixing stations (6-1/2 in pump centres). Not for HydroMixer 165/166/167, which use a 5-1/8 in centre pump. |
Documentation
Revit / BIM content guideRelated Products
Frequently Asked Questions
It is the Grundfos UPS 15-58U three-speed circulator fitted to Caleffi 172-series thermostatic manifold mixing stations. It does not fit HydroMixer 165/166/167 units, which take a 5-1/8 in (130 mm) centre pump.
115 V / 60 Hz single phase, protection class IP44.
Caleffi lists it as the replacement circulator for 172-series stations, supplied as pump only with no fittings included. Confirm the pump body and centre distance on your existing unit before ordering.
- Type:
- Accessory
