Hearing a pop, bang, or rumble coming from your water heater? You aren’t alone. In Orange, CA , hard water sediment is the usual suspect. These mineral deposits trap heat at the bottom of your tank, causing miniature steam explosions. While some sounds are harmless, others warn of an impending leak. Here is how to diagnose the noise and when to call a pro. Why Your Water Heater Sounds Like Popcorn Strange noises from the utility closet aren't ghosts they are physics. Here is