Pentair Thermal Fuse (White) | ETi Series Pool & Spa Heater | 475998 C4440 the filter canister lacks the

the filter canister lacks the structural support needed to remain upright during operation

preventing unfiltered water bypass

restoring the pump's internal water-tight integrity at the shaft interface

If the existing pool plumbing cannot pull from the lower main drain

or stripped base restores the structural integrity of the filter assembly and ensures proper alignment of all connected components

Pentair Thermal Fuse (White) | ETi Series Pool & Spa Heater | 475998 C4440 the filter canister lacks theThe Pentair Thermal Fuse White (475998) is the OEM replacement thermal fuse for the Pentair ETi Series pool and spa heater line, including the ETi 250 and ETi 400 models. 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 voltage components without proper certification. The thermal fuse is a one