I hope this hasn't been previously answered but I couldn't seem to locate anything. I plumbed in a Hayward flow switch the other day. It is a GLX-FLO. This morning while playing with my VS pump I noticed that when I turned the pump down to about 20% the flow switch indicated no flow. I can't find anything from Hayward that has the minimum amount of flow to trigger the switch. Is there a switch I can use that will work with extremely low flows? Note that I do NOT have a salt water generator. I simply have the flow switch hooked up as a precaution from burning out the pump should there be no flow for whatever reason.