An RO membrane is cheap why not just run a regular unit and skip the resin? I would imagine it's the membrane itself doing most of the work and a high rejection rate one is still reasonably priced and last a few years if you take care of it.
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Originally Posted by whatcaneyedo
All of my RO/DI system's waste water travels 50' to a 55gal plastic drum in the laundry room. I coordinate washing clothes around when it runs so very little is ever actually wasted. There is an emergency overflow drain on the drum so that it doesn't overflow onto the floor if it gets too full.
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out of curiosity how does this work? normally you're feeding water under pressure to the machine and I'm guessing a solenoid in the machine opens and closes. is the barrel elevated to gravity feed into it instead?