Pentair Transformer | ThermalFlo HP Titanium Heat Pump / UltraTemp 220 ETi | 473155Z Youth Floats Upstream (before): ~10 inches minimum

Upstream (before): ~10 inches minimum of straight pipe

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

Emergency Shut-Off for Pentair Automation Control Systems

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

photograph the ring and niche face side-by-side and compare the bolt pattern to the product image before adding to cart

Pentair Transformer | ThermalFlo HP Titanium Heat Pump / UltraTemp 220 ETi | 473155Z Youth Floats Upstream (before): ~10 inches minimumThe 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