For all those that don’t know, fountain soda is a mixture made from tap water and syrup. If you’re Makpid not to drink the tap water in NYC because of copepods than you should not be drinking fountain soda either only bottled soda.
Well if you purchase it in a place that is kosher I’m sure the Mashgiach made them filter the tap or at least I hope he would. But otherwise why would it have a filter
In my experience, all soda fountains and coffee machines I have ever seen had filters on the water line. Not for kashrus reasons, but for quality control. They don’t want their product to taste bad just because of dirty water.
@yitzyk
You don’t know if that filter your talking about is good enough to remove copepods. And Even if that’s true,how can you know that they all have a filter because the ones you saw had one?
Ask your local Rav or Vaad Hakashrus. I did this regarding some local 711s when this sugya came up almost 20 years ago, and they said told me that the local machines had sufficient filters.
It should be noted that not all rabbanim or hashgachos require filters. Speak with your Rav, and make your own decisions.