I've learned that letting metal contact reverse osmosis filtered water is generally a bad idea as it corrodes the metals and leaches them into the clean water supply.
However, I'm having a hard time finding a fully plastic 1/4-in compression fitting (1/4-in female to 1/4-in male) to connect my RO line to my refrigerator. Should I be concerned about the copper insert that will be in contact with the RO-filtered water? Will it affect the integrity of the connection and/or the water quality?