The hot water took too long to come out of the tap. That is what I was trying to solve. I did not intend to discover that, for a while there, water heaters like mine may have been open to anybody.

Ever hop into the shower only to get blasted by a stream of freezing water? Or maybe your hot water fizzles out halfway through and you're left shivering as you wash the last streaks of shampoo out of ...