Cmon diyers there must be a way of doing this with our own RO units The waste could be put into a second water butt and the water pumped back through RO somehow ?or is that too easy Just a thought !!!
You could cut down the waste by feeding some of it into your hot water and storage tank. We produce too much waste to use it all on baths etc, but even if you used half then you would have around 30% waste instead of 60%Peter Fogwill