Product Information
Description
Pentair UltraTemp / ThermalFlo Heat Pump Transformer, 24 VAC, 50 VA (473155)
Transformer for Pentair heat pumps and the UltraTemp ETi hybrid heater
The Pentair 473155 is the transformer used in the UltraTemp heat pump, the ThermalFlo HP Titanium heat pump and the electrical system of the UltraTemp ETi hybrid heater. It takes a 208/240 V supply down to 24 VAC and is rated 50 VA. Pentair's current catalog lists it as 473155Z.
| Manufacturer | Pentair |
|---|---|
| Part Number | 473155 |
| Current Pentair Number | 473155Z |
| Pentair Description | Transformer |
| SKU | PST-_473155 |
| Application | Heat pump |
|---|---|
| Input Voltage | 208/240 V |
| Output Voltage | 24 VAC |
| Rating | 50 VA |
| UltraTemp Heat Pump | Item 18, Transformer |
|---|---|
| ThermalFlo HP Titanium | Item 18, Transformer |
| UltraTemp ETi 220 Hybrid Heater | Item 36, electrical system |
| UltraTemp 3-Phase 50 Hz | Uses transformer 473790 instead |
| Related Pentair Part | Fan relay 473150Z (UltraTemp and ThermalFlo) |
- Pentair UltraTemp heat pump (except 3-phase 50 Hz models)
- Pentair ThermalFlo HP Titanium heat pump
- Pentair UltraTemp ETi 220 hybrid heater
Does it fit a 3-phase 50 Hz UltraTemp?
No. Pentair's UltraTemp parts sheet lists a separate transformer, 473790, for 3-phase 50 Hz units only.
Is 473155Z the same part?
Pentair's 2025-2026 catalog lists the heat pump transformer as 473155Z in the same diagram positions where its earlier UltraTemp parts sheet shows 473155.
Additional Info
| Category | Parts Pool Parts Pool Heater Parts |
| SKU | PST-_473155 |
| MPN | 473155 |
| Replaces | 323493 |
| Manufacturer | Pentair |
| Weight | 2.04 lb |
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PST was great at communicating the status of my order throughout the various stages. I actually did encounter a shipment issue and they handled it without issue. I will be doing business again with them.
as described, fast shipping
