An older 5 stage for example, if you need to replace the two ROs at maybe $400 a piece and the DI and pre-filters all at once, that can add up pretty quick.
Take into account the shape of the frame, I’ve seen them rust completely through. The state of the filter housings, things like that.
Some people lease cars, they just want something new every 3 years. And there are plenty others that get a new car and use it for 10-15 years, just perform the maintenance and keep rolling.
Well if you get a new system from ABC, plan on getting a new one in about 12-18 months. Their RO membrane housing is made of plastic. It can’t handle pressure and will burst on you! My advice for everyone is to stay away from their WFP/pure water products.
I’m on my third season with one Xero Pure and my other Xero pure is on its second season. Never even hooked up the DI on them. I replace the carbon filters every three months. Both are in perfect condition.