"I wanted an easy way to drain the water heater without messing with the plug. So I replaced the plug with a metal braded hose and a ball valve. A lot of people warn not to mix metals with the water heater tank, so I used a nylon nipple between the tank and hose. I also cut the rubber coating from the valve handle so it doesn't end up being melted by the burner. Cracking the pressure valve helps drain the tank." (Jeff's RV Page)
Galvanic Corrosion is the issue he is trying to avoid. Two different metals in contact will react with each other over time causing corrosion. Depending on the two metals this corrosion can occur VERY fast and destroy the items in question by accelerated "rusting."
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Lou & Freya the wonder dog
2008 GMC Sierra 3000HD Allison Duramax
2019 Flagstaff 8529FL
Galvanic Corrosion is the issue he is trying to avoid. Two different metals in contact will react with each other over time causing corrosion. Depending on the two metals this corrosion can occur VERY fast and destroy the items in question by accelerated "rusting."
Look at your water hook up for your washer at home. Likely you will notice a green-like corrosion around it... Same type of thing.
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2005 Ford Expedition 5.4 4x4
2012 Tracer 3150BHD