Sean, I suppose I'm being a little "belt and suspenders" on this. I'm new to the SWG game and given the highly corrosive salt air environment when we have our pool, I prone to looking for worst case backup scenarios, e.g. outside AC units usually last no more than 5 years. Re the second pump, those are easy to come by locally, so I'm not quite so paranoid there. Not having had a SWG before, I think I'm just trying to foresee all the possible scenarios and how I would deal with them. And having an alternative chlorine feeder seemed like an easy fix. But I think you are suggesting that the great reliability and service of Pool Pilot means I need not worry!!