Quote:
Originally Posted by Bugsinrugs
If you replace the magnesium anode in the water heater every 5-7 years one can easily double the life of the heater. That along with a good flush. 40 bucks for a anode is money well spent.
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+100
Water heaters have become much more efficient, but also are built cheaper than in years past.
While I don't think this means they inherently have shorter lifespan, it means they will if they are maintained in the same manner, which is typically not at all.
Replacing the anode and flushing the tank 1-2x a year will add years if not decades to the lifespan and both are typically very easy.