Water needs to flow through a salt system properly in order for chlorine to enter your pool and keep it healthy and clean. If an error message on your chlorinator reads “no flow” chances are you have to replace the system’s flow switch. This Hayward/Goldline replacement flow switch is relatively easy and will quickly fix your no-flow problem. Compatibility: Hayward/Goldline’s Aqua Logic, AquaPlus, AquaRite, AquaRite Pro, AquaRite XL, Blue Haven, H40, LeverEdge Guardian, Mineral Springs, Naturesoft, Pro Logic, SmartPure, Splash SP-40, SplashCLEAR, and SwimPure Plus. Goldline Controls Flow Switch Replacement.