Conventional storage tank water heaters (gas or electric) are built to last six to ten years.  Water heaters bought at “big box” stores do not have 100 percent replacement warranties. The warranty is prorated and reduces each year. In addition, you will have to drain the existing unit and return it to the store in order to initiate what is left of the warranty. Water heaters purchased through a licensed plumber should carry a warranty that guarantees replacement of the tank if it fails during the warranty period. Standard warranties are issued for 6 years, and you can upgrade to a 10 year warranty for an additional cost. The 10 year warranty will come in the form of a 10 year tank or an upgrade kit installed in the tank. If the water heater fails during the warranty period, your plumber will get the necessary information off of the unit and initiate the warranty through the supply house for immediate replacement.
In the state of Massachusetts, you must have a licensed plumber install the water heater. Failure to do so could result in voiding a homeowner policy if the water heater leaks and causes damage. Don’t assume that the technician sent to your home is a licensed plumber and not an apprentice. A licensed plumber should be able to produce their license upon request.
Be proactive and check the label on your unit to see when it was installed. If you are coming upon the 10 year mark, inspect the tank for signs of rusting or leaking. If it is rusting, you may want to have it inspected by a plumber. If the tank is leaking, contact your local licensed/insured plumber to replace the unit before it becomes an emergency situation.
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