It’s likely that you already understand, when water meets metal, there’s a high chance of corrosion occurring. Corrosion is the term used to describe the chemical reaction between water and metal in the presence of oxygen. This type of damage can quickly ruin many types of appliances and equipment as it weakens the metal and that metal starts to rust and break away.
So what about your home’s water heater? It is, after all, primarily made of metal, and it stores and circulates water. So why doesn’t it start rusting? Well, corrosion is rare in water heaters, and usually only starts late in the system’s life, if not for the following protective measures inherent with the system setup.