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Water Heaters
5 Min Read
By Tank Specialists
About This Guide
If your water heater sounds like a pot of popcorn boiling over in the basement, you are listening to mineral sediment trapped at the bottom of the tank. As hard water is heated, calcium carbonate precipitates out of solution and hardens into a thick insulating crust over the lower heating elements.
Trapped water bubbles boil violently beneath this calcified sediment layer, creating the popping and banging sounds known as 'kettling'. Not only does this reduce heating efficiency by up to 30%, but it also causes localized overheating that weakens the tank's internal glass lining, eventually leading to a catastrophic tank rupture. Annual tank flushes and replacing depleted sacrificial anode rods double the lifespan of your unit.
Diagnosis & Maintenance Guide
Popping sounds indicate severe calcium carbonate sediment buildup
High-pitched screeching signals restricted flow through water valves
Ticking or tapping sounds often stem from heat trap nipple vibration
Perform a complete tank drain and sediment flush once every 12 months
Inspect magnesium or aluminum anode rods every 2 to 3 years
