daveroconn
CZ, sorry I couldn’t get to this sooner but I was on the road. Sounds like you are dealing with an automatic filter of some sort. Without any further information I would say it’s most likely a carbon filter that automatically backwashes itself. No, I have never seen any ion exchange softeners that don’t use a brine tank to regenerate the resin inside the tank. Maybe you could supply me with a little more info on system and I could be of more help. Good luck
