Scale builds on the element or the burner, the heater works harder every year to do the same job, and the tank gives out well before the warranty suggested it would. That is the ordinary story on this shore and it has nothing to do with the brand on the box.
Salt air adds a second thing. The anode rod inside the tank is a sacrificial part, designed to corrode so the tank doesn’t, and around here it gets used up faster. Nobody checks it, which is fair enough, because nobody tells you it exists.
Then there’s fuel. Most houses here run electric or propane, because natural gas does not reach much of coastal Sussex. If you are hoping to switch to gas, find out whether there is a main on your street before you plan a system around it.
We handle both sides of this: repairs when a repair is the right answer, and replacements when it isn’t. We’ve worked the Delaware shore since 2001 and we’re locally operated. Every technician who turns up at your door is background-checked, and we clean up before we leave.