Rheem water heater makes loud popping or rumbling noises during heating

Safety first: Turn OFF power or gas and allow water to cool before flushing.

• Drain and flush: Connect a hose to the drain valve, open a hot tap, and drain several gallons. Close the drain, refill, and repeat until water runs clear.
• Deep flush: For severe sediment, fully drain the tank, remove the drain valve, and use a wand or probe to break up and flush out deposits.
• Inspect elements (electric): Remove and inspect elements for scale. Clean or replace as needed.
• Install softening or treatment: In hard water areas, consider a water softener or scale reduction system to prevent recurrence.