Who actually buys the likes of Ionics and Brodex complete systems? I know a fairly large operation round this way called Progress Window cleaning use their kits. And I can understand an operation of that size investing that kind of cash. But has anyone ever known of a small operation spending that much? What do you get from it? Is it really better than anything we can do ourselves? Sure they are packaged beautifully and are no doubt refined - but what about things like couplings ageing and leaking? A lot of these complete systems still use the same half inch QRC's. So what are you paying for other than a name? I simply would never spend that much money. I'm just curious to know what convinces people to if they aren't a large company. And even if it is just large operations buying these systems. Can there be enough of them to keep Ionics going? While I'm at it - any thoughts on what the new Ionics Zero system actually means. They've got a couple more filtering steps in there beyond your normal stages. And some gumph about it killing legonella. Is it UV filtering by any chance? After all we can all get to zero ppm easy enough. Edit - this isn't me ranting or judging. I am just simply curious to know why they charge so much compared to your average self install from any number of retailers.