I am in the process of setting up a iron filter and watersoftener in a new home. I was considering using a rainbow automatic controller with two valves to open and close one valve for flushing a sand/particulate filter and the the second valve to flush the contact/settleing tank. Does anyone see any problem doing this? I have used these valves in several homes for several years with no problems and thought it may be a good idea for some automation. Thanks for any replies.