Safe water for orchids.

[cheekma]

I am new to the orchid board and have a question for the more experienced members. We built a sunroom and connected the outside faucet to the sunroom for water. Unfortunately, the original plumbing in the house was messed up and the water softener affects all faucets, including the outside faucets. Although I understand that rainwater would be best for the orchids, it is just not practical. We have well water and I am currently going into my basement and filling the water from a single faucet that is before the water softener. Is there a filter that I can use beneath my sink that will filter the salts from the water softener so that I can use the water in the sunroom? Can I use any of the filters that you see in the hardware stores that "purify" the water for drinking? Or is there a specific filter that would be good for using for orchids? Thanks so much.