Can UV filter pipes of water purifiers have N Fowleri like in water heater pipes or UV would inactivate them? What if filters and membrane is old, will it permeate N Fowleri? Since water in filter tank was cold, will it inactivate it in cyst form. I have read on various posts that it is active in warm waters and usually happens when water is forced up the nose like diving, swimming or using neti pots. So can washing face lead water to go that up the nose or can blowing nose to expel water later cause so much pressure to pull it up the nose? Please help I don't want to die a loser, I haven't done much in life. We use borewell water from jet pump and now the water in tank is still cold but I used water from the RO unit which wasn't changed for 2 and half years this time and am afraid if the UV filter may have heated the water. Though the water I used finally stored in RO tank appeared cold.