Available on Project MUSE and JSTOR. Online access to Contemporary Literature is available as part of the Project MUSE collections. All back issues of Contemporary Literature beginning with Vol. 1, 1960 are available online through the JSTOR digital archive.
Many manufacturers recommend water heater anode replacement every two to four years depending on the hardness of the water that passes through the tank and the quality of the water heater lining.
How long does a Water Heater last? While statistics show the average lifespan of a water heater is 8-12 years for a traditional tank water heater, there are many factors involved in the actual lifespan and what you are considering the term lifespan to mean.