Why should I bother with a Marathon, my last water heater lasted 22 years?

That's impressive, but not uncommon for older water heaters. The older water heaters purchased in the 70's and 80's had much thicker steel and more porcelain than today's units.

  • Manufacturers have cut so many costs from the manufacturing process, most steel water heaters made today will not last much longer than their warranty of 5 or 6 years.
  • It's much like the automobile, the thickness of the metal on today's units is very thin compared to older models and therefore they tend to rust out and leak over time.