I ran my well water through a large mainline filter first, then to the water softener, then to the ro. The soft water is easy on membranes and the ro removes the softener salt for drinking purpose.
My feed from the softener was split, with part feeding the ro and the rest to the house fixtures that needed no ro water. The ro was only used to feed a spigot tap at the kitchen sink and the fridge water & ice maker, plus the tanks.
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Doug
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