The Vertex Puratek100 is actually only CDN $370 at J&L and is actually not a bad price for what you get. It has an inline TDS meter and built in booster pump. It is pretty efficient and is close to 1:1 in waste to RO water production. Cheaper units generally produce about 3 to 5 times as much waste water as RO water. That is the one I have and it is great.
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