Noticed that old water heater leaking? Maybe that anglestop next to the toilet seems to be really brown, nasty, or even hard to turn off and on?
Most people don't realize this is because certain metals corrode faster when they come in contact with another metal. Galvanic corrosion is the most common type of corrosion on water lines.
When corrosion starts happening on water heaters it can affect the internal walls of the water heater faster due to the top connections corroding. While you may have time when you first start noticing this corrosion on the water heater, once it becomes very significant then your water heater may be corrosions next target and replacing a water heater can be a pricey replacement.
Prevention:
The easiset steps to take to stopping corrosion or keeping corrosion from starting is to replace the corroded areas with new fittings and ensuring if there's a connection between two disimilar metals to add a Dielectric Union to ensure the metals are properly seperated so they won't corrode.
Disclaimer
While replacing these areas with the proper fittings, unfortunately metal can corrode from what comes through the water line connections and doing this will help prevent corrosion for a significantly longer period. So it is best to check these areas periodically to ensure there are no surprises.
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