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发表于 2015-5-31 19:48
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ccc123 发表于 2015-5-31 19:37
多点信息,那种烧气的也要换anode吗?
还有就是为什么不换会内胆腐竹? ...
Most water heater tanks are steel with a thin glass lining to protect the metal from corrosion. Since the lining eventually cracks, tanks have a second line of defense against rust: a long metal “anode rod” that attracts corrosive elements in the water. When the rod itself becomes so corroded that it can no longer do its job, the tank soon rusts out, leaks and needs replacement. However, if you replace your anode rod before it fails, about every five years, you can double the life of your water heater.
Rods are made from magnesium, aluminum or aluminum/zinc alloy. Aluminum replacement rods are sold at home centers. In most cases, the hexagonal head of the rod is visible on the top of the water heater. If you don't see the hex head, check your owner's manual. The rod may be under the water heater's sheet metal top or connected to the hot water outlet nipple. (A few newer plastic-lined tanks have no anode rods to replace.)
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