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Water Filters, Systems and Purification Directory  - Publications  - Research

Parent Category: Research

Water filter research.

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Smelly Hot Water

Smelly Hot Water It is common for cold water with a high sulfate content to transform from odor free to obnoxiously smelly after passing through the hot water heater. Typically the sulfates react with the magnesium (and even the aluminum) anode rod to chemically reduce the sulfate to sulfide. It is also speculated the smell may be the magnesium rod reacting with naturally occurring anaerobic bacteria creating hydrogen sulfide gas. To rectify the problem the magnesium rod needs to be replaced with an anode rod comprised of an aluminum/zinc alloy rod. This specialty anode rod is less reactive with the sulfate thus eliminating the reduction reaction. The cost for a typical 39” anode rod is $70.00.

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