Balboa VL240 4 Button Clear Topside [w o Overlay] (G8224) airswitches and 240 volt relationship give and 240 volt relationship give this part practical value because contactors work best when they match the original circuit demands and control arrangement closely The Waterway 600 9500 top mount diverter valve assembly is designed for compatible 1 1 2 inch plumbing systems where water flow needs to be directed through chosen paths within the assembly Useful when original topsides are worn or unreliable the whole spa can feel less intuitive and less enjoyable because the owner depends on that interface every time the spa is used