Usually because the protective coating on them corrodes with age.
No, the upper and lower water heater elements are not the same. They serve different functions in heating the water in a water heater.
There are two insulated heater elements that heat the water.
Check the heating elements in the water heater. These may be bad and need replaced.
The anode rod in a water heater helps prevent corrosion by attracting corrosive elements in the water, protecting the tank from rust and extending the life of the water heater.
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No, they are metal with an insulation coating
If electric, the elements will blow very quickly.
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The purpose of a well water anode rod is to protect the water heater from corrosion by attracting corrosive elements in the water. The anode rod sacrifices itself by corroding instead of the water heater tank, extending the life of the water heater.
1-2 hours
Typically, a water heater can last for 8-12 years, regardless of whether an element is replaced. Regular maintenance, such as flushing the tank regularly, can help extend the lifespan of your water heater.
Most hot water systems fail because corrosion causes a leak. Occasionally the Temperature and Pressure relief valve starts leaking and needs to be replaced. Because they run at relatively low temperatures, the elements rarely have problems.