In the latest Home Zone, we're delving deeper into water tank maintenance with a focus on the unsung hero of your water heater system, the anode rod. In the latest Home Zone, we're delving deeper ...

You can find this tankless water heater flush descaling solution at Amazon, as well as this tankless water cleaning kit 2.

Turn off the heater and the water supply, let it cool, then drain about half the water. Disconnect the water inlet pipe or remove the anode rod and pour in one or two gallons of vinegar.