When to Replace a Water Heater (Without Taking Cold Showers)
Water Heater Woes
Water Heater Leaks
Troubleshooting Your Hot Water Heater
How do I know when it's time to replace my water heater? I built the house in the spring of 1985 and I still have the original water heater. This water heater has never been drained. Shortly after it was installed the pressure valve leaked and was replaced, and I have been the only person living in the house up until Sept. 1997 when my mother moved in with me.
For about three months I have noticed that the pressure valve has been leaking a little water, so when my brother came up for the holidays, I asked him to change it. Both the pressure valve and the galvanized metal nipple showed a considerable amount of junk in them. I replaced both. The only noise I have ever heard from the water heater is a rumbling when a faucet is turned on while the water heater is heating water.
BO in the Mojave Desert, CA
There is no tried and true way to know precisely when a water heater needs replacement. Obviously, a leak in the body of the heater requires immediate replacement. If there is a major malfunction, such as complete or partial loss of hot water supply, leakage around plumbing fittings, or the appearance of excessive corrosion on the heater body itself or at the heater's plumbing connections, AND the unit is more than eight years old, replacement may be preferable to repair (if a repair is possible, that is). I would leave this up to your budget and repair skills.
All the active parts and most of the plumbing parts--the heating elements, thermostat, anode rod, and the various valves--are designed to be replaceable. The main obstacle to disassembly is corrosion. A water heater corrodes more quickly than other plumbing fixtures because of the constant high temperature at which it operates, and the fact that sometimes the water heater acts as an electric ground, accelerating this corrosive process. Corrosion makes replacing any parts chancy, since the replacement may leak, necessitating the replacement of the entire heater. So, like a conscientious Boy Scout, be prepared for the possibility of replacement even when the repair seems simple and straightforward. So it goes with plumbing!
In your specific case, with a water heater more than 13 years old, repairs are probably not cost-effective, since the life expectancy of a water heater is only 8-12 years. As they age, they become less efficient. This is true for all heaters, but more for electric types. Modern water heaters have better insulation and are more efficient "out of the box," so you may notice dramatic savings in fuel and/or electric costs by replacing it.
copyright G.G. Alonzy
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