Hadn't had any leaks but had problems with bad plumbing such as the fresh water line being kinked at a sharp right angle cutting the water flow to a trickle and the black tank flush check valve being installed backwards completely blocking off getting any rinse water to the black tank. And having our dealer repair a leaking freshwater tank drain valve connection.
Also had numerous other shoddy workmanship problems to deal with in our 2016 Arctic Fox 25R . Overall it is a good TT. That is after redoing and correcting all the bad workmanship that was done on the assembly line.
If you complain too loud on the Northwood RV Owners Association website forum, the moderators will make excuses for Northwood and threaten to ban you from the forum. :R
I wish you the best in getting that water problem fixed soon. That is not good at all and certainly will cause other problems if it persists. :(