Shut off the gas or electricity to the water heater and open a hot water faucet and let it run full blast for about 10 minutes to reduce the water temperature in the tank.
Cleaning gas water heater.
Use the crevice.
Run the hose end to a basin where you can collect hot water.
Allow the tank to drain completely flushing out flakes of mineral deposits along with the cooled water.
If necessary unthread any mounting screws and remove the burner access cover.
Open a hot water tap close.
How to clean a hot water heater.
Open the drain valve after unscrewing the water supply line and allow sufficient time for the water to drain out of the heater into the basin.
Remove the temperature pressure release valve and screw in the vacuum adapter.
Attach the shop vacuum hose and fire up the vacuum.
Once the water has drained close the valve.
Next unthread the nuts or screws securing the burner plate itself.
Before you begin be sure to unplug the water heater s power cord and shut off the gas supply.
Unthread the nut to detach the burner supply tube from the gas or control valve.
Turn off the hot water heater.
If there is a thick layer of dust or dirt on your hot water heater use a shop vac to take off as much dust as possible.