Pentair Heater Dual Relay Kit | 520403 AquaPro Automation systems rely on stable

Automation systems rely on stable communication between remotes and controllers

Proper sealing reduces repeat service calls

Manufacturer part number SPX1485B3

Ultra fine options are used when pools experience heavy dust or sediment

Add the contents to spa water after use or as part of regular maintenance

Pentair Heater Dual Relay Kit | 520403 AquaPro Automation systems rely on stableWhat 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