Richmond water heater makes popping or rumbling noises during heating.

Safety first: Turn OFF power or gas and allow the heater to cool. Hot water and sediment can cause burns.

• Flush tank (tank-type): Connect a hose to the drain valve, open a nearby hot tap, and drain several gallons until water runs clear. For severe buildup, fully drain and flush the tank.
• Descale tankless (tankless models): Use service valves, a pump, and descaling solution to circulate through the heat exchanger for the recommended time, then flush with clean water.
• Install softening or treatment: In hard water areas, consider a water softener or scale reduction system to prevent recurrence.
• Repeat maintenance: Schedule annual flushing/descaling as part of routine maintenance.