Pentair Transformer | ThermalFlo HP Titanium Heat Pump / UltraTemp 220 ETi | 473155Z Youth Floats Always lubricate this O-ring kit

Always lubricate this O-ring kit with a silicone-based lubricant before installation

Large acrylic balls indicate you need the Tsunami Water Valve Kit (540242) instead

PowerMax commercial heaters span a wide BTU range — verify your specific unit's service documentation to confirm this ignitor applies to your model

Connection Size 3" Quantity Included 1 (two required per filter — see callout above) Fits Into

Pentair Transformer | ThermalFlo HP Titanium Heat Pump / UltraTemp 220 ETi | 473155Z Youth Floats Always lubricate this O-ring kitThe Pentair Transformer (473155Z) is the OEM replacement transformer for the ThermalFlo HP Titanium heat pump series and the UltraTemp 220 ETi heater, restoring proper low voltage control circuit operation when the original component has failed. IMPORTANT: ELECTRICAL COMPONENT PROFESSIONAL INSTALLATION REQUIRED This transformer is an internal electrical component of a heat pump or heater control system. Installation or replacement must be performed by