FREE SHIPPING for this item! Water needs to flow through a spa plumbing system properly in order to keep it healthy and clean. This Sundance® Spa / Jacuzzi® replacement flow switch is relatively easy and will quickly fix your no-flow problem. Are you looking for the flow switch for your Hayward®/Goldline® Salt System? Then you will need a different flow switch, which can be found here: Aftermarket Flow Switch for Hayward®/Goldline® Features: Replaces: Sundance® Spas 860 Series Flow Switch (2) 3/4" and (1) 3/8" hose barb fittings Replaces: Harwil® Q-12DS-C2/SUN860 Flow switch made for Sundance® Spas/Jacuzzi® 860 Series systems ONLY. Does not replace Q-12DS-C2 Flow switch for Hayward®/Goldline® Salt Systems. NOT Compatible with CAL SPAS® Arrow on switch indicates the direction of water flow, ensuring proper installation Heavy-duty, long-lasting Specifications: Model numbers: Q-12DS-C2/SUN860 , SUN860 , 6560-857 , 6560-858 , 6560-860 , 2560-040 Shipping weight: 1 lb. Note: Make sure that there really is a problem with the flow switch before replacing it! Sometimes, the flow switch will give an error message due to another problem that is preventing the system from optimal flow.