Kinda odd posting this now but something stirred me to get this resolved before my warranty is up. I have a 2018 reflection 315rlts TT that we full time in. Last winter I had issues with the cold water line that supplies the hot water tank freezing up. I know it was that line because i had no water flow from my pressure relief valve on the hot water tank when i opened it. the times that it froze up it hit the mid to upper teens with a light breeze at most. since these are tested down to zero i felt like it shouldn't have froze up in those condition. I had a cougar that i took camping and never had any issues with lines freezing. has anyone else had better results in cold weather?

thanks