How can I protect my copper pipe from corrosion while connected to the water heater’s hot side?
Asked by Suchita Chatterjee 
4 months ago
Last Updated: August 6, 2024
Hey, do you have any suggestions on how to stop corrosion? It’s the copper pipe that goes from the water heater on the hot side.
Disconnect the connection and install a shark bite to pex adapter
Seems like there was a leak from the CPVC female adapter, causing mineral deposits to build up.
Yep, that’s all it is, just a little seepage over time, .
Clear coat
When it comes to irrigation, PVC pipe is the way to go. But avoid using it for water main pipes, especially hot water. Copper or PEX are better options.
Pointed out that CPVC, while not the best pipe material, is actually approved for use in potable water systems.
CPVC, like mentioned, is really not good. I still recommend replacing it because it can become extremely fragile over time, leading to significant water damage.
And I definitely agree with that advice.
I typically grab a Brillo pad first, followed by a cloth soaked in kerosene
For a leak-proof connection, make sure the fit is snug from the beginning. Remember: thread plastic into metal, never the other way around.
Apply Flitz and then wrap it with 10 mil tape.
There’s a leak, we should redo the connection.
The pipe is leaking, it’ll need to be changed. The issue arises from using different materials that expand and contract at different rates, leading to a joint failure. When I connect these parts, I always use a union with a rubber O-ring to avoid this problem.
How long has that water heater been in use? I’m asking because if the sacrificial rod is worn out, it could be a significant factor. Depending on the water’s mineral content, the rod typically lasts between 5 to 10 years. I changed mine after about 7 years when it was nearly worn out.
Overall, what I’m seeing in the photo looks like corrosion from a leak right where the CPVC connects to the brass. Remember, it’s the brass nut screwed onto the copper, and that connection seems solid.