Pentair Heater Dual Relay Kit | 520403 AquaPro This component is a floor

This component is a floor return fitting assembly used to return filtered water into the pool or spa through the floor return path

Replacement shield kit designed for the Napoleon GD-303

Replacing the motor restores steady filtration and system operation

or after winter damage

Pentair Heater Dual Relay Kit | 520403 AquaPro This component is a floorWhat This Part Is Used For Pentair 520403 Heater Dual Relay Kit is a replacement relay kit used in compatible Pentair heater control systems. It manages power distribution within the heater assembly. Why This Part Matters A faulty relay can prevent heater startup or cause intermittent operation. Replacing the dual relay kit restores proper electrical switching. Reliable relay performance supports consistent heating cycles. Key Features and