Replacement Heater Flow Switch for Sundance Spas — Part 6560-857

Replacement heater flow switch designed for Sundance Spas, part number 6560-857. This flow-activated switch senses proper water circulation and only allows the spa heater to run when adequate flow is detected, helping to protect the heater from damage due to low or no flow. Intended as a direct replacement for the factory unit in compatible Sundance spa heater systems. Simple swap-in part for restoring correct heater flow detection and safe heater operation.