Pentair Stack Flue Sensor (Blue) | ETi 250 / ETi 400 / UltraTemp ETi | 475601Z Liner Installation Tools If you are servicing more

If you are servicing more than these o-rings

The result is sparkling clean water

✓ Salt system safe: Won't interfere with your salt generator

this filter delivers maximum dirt-holding capacity and superior water clarity in a short-bodied spa filter design

effective operation

Pentair Stack Flue Sensor (Blue) | ETi 250 / ETi 400 / UltraTemp ETi | 475601Z Liner Installation Tools If you are servicing moreThe Pentair Stack Flue Sensor (475601Z) is the OEM replacement flue gas temperature sensor for the ETi 250, ETi 400, and UltraTemp ETi series pool and spa heaters. This is the blue sensor confirm the color of your existing part before ordering. IMPORTANT: LICENSED PROFESSIONAL INSTALLATION REQUIRED Gas and electrical heater components must be serviced by a licensed pool professional or qualified HVAC technician. Do not attempt to service gas or high