Once I got my rinsekit plus with heater and assembled it the one thing I wish that could have been changed was thread tap on the tank. If they could have molded in a a metal ring to accept the metal heater I would feel much better about screwing in the heater and making sure it's tight. I can see where it might be easy to install the metal heater rods into the plastic tank and strip the threads. I added plumers Teflon tap to the threads to help make a better seal while not over doing it. I would be worried if I lent this to a friend and they stripped the tank.