Pentair ETi 400 Thermal Fuse (475998) risingdragon Useful for repair and visible

Useful for repair and visible fitting refresh work

Many repairs do not require replacing large assemblies

Designed for compatible 155B and 155C heaters

This type of replacement is especially useful when the canister remains serviceable and only the cartridge itself needs renewal

Pentair ETi 400 Thermal Fuse (475998) risingdragon Useful for repair and visibleRather than replacing a larger assembly too soon, Pentair ETi 400 Thermal Fuse (475998) allows a more precise repair to the component that needs attention. This thermal fuse is a small but important protective component for ETi 400 heaters, intended to interrupt unsafe high temperature conditions inside the system. It is useful when the existing component shows wear, damage, age related failure, or performance issues in the larger pool or spa system.