When you hear your water heater popping, the reason is nearly always sediment. Hard water contains minerals that settle at the bottom of the tank and form a crusty layer. The heating part heats the water, and the steam pops up in ever-growing bubbles under the sediment. This is not just irritating. The accumulation of sediments causes your heater to labor more, which raises the cos... https://bluepacificcapecod.com/bizarre-burbles-of-your-water-heater-here-is-what-they-mean-and-how-to-repair/