A.O. Smith Electric Water Heater 0400 Horizontal

Turn OFF the electrical disconnect switch

Close the cold water inlet valve to heater

Open a nearby hot water faucet to vent the system

Is the heater being drained for an extended shutdown?

Leave the drain valve open during extended shutdown

DANGER! Burn hazard. Keep clear of drain valve discharge outlet.

Turn OFF the electrical supply to the water heater at the breaker or disconnect switch.

Ensure the cold water inlet valve is open.

Open a nearby hot water faucet and let the water run until the water is no longer hot, then close the hot water faucet.

Connect a hose to the water heater drain valve and terminate it to an adequate drain.

Ensure that the drain hose is secured before and during the entire flushing procedure.

Open the water heater drain valve to flush the storage tank.

Flush the water heater storage tank to remove sediment and allow the water to flow until it runs clean.

Turn OFF electrical disconnect switch

Drain the heater following Draining instructions

Remove the banks and gaskets from the openings

Check for signs of a depleted anode rod

Does the anode rod show signs of depletion?

Turn OFF electric supply to the water heater

Shut OFF the water supply and open a nearby hot water faucet to depressurize the water tank

DANGER! Burn hazard. Keep clear of drain valve discharge outlet.

Ensure the area around the drain valve is clear of obstructions.

Is the drain valve discharge outlet clear of personnel and equipment?

Monitor the water flow until it runs clean.

Close the drain valve after the water runs clean.

Inspect the area for any water leakage.