How to combine a water softener and a water filter

by Jalyn
(USA)

We are remodeling a house and installing a water softener since we have very hard water. We are also installing an under the sink reverse osmosis filter.
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Should the water running to the RO system be ran through the water softener first or not? It seems that the softener would add potassium/sodium to the water and then the RO system would have to remove it.

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