water heater leakin pressure release valve

I do the air chamber deal but after the winter 2 seasons ago the relief valve was dripping. At home I removed it and soaked it in vinegar for a couple of days. It looked new again and is still doing a good job and will soon be 14 years old.

I soak the entire plumbing system in vinegar each summer for 2 days and drain and rinse the water lines.
chevman