A.O. Smith Water Heater DRE-120-6

Turn off the electrical disconnect switch

Attach hose to outlet opening of drain valve and direct end to drain

Open the drain valve by turning the hand wheel to the left (counterclockwise)

Is water flowing from the opened drain valve?

If water does not flow, describe the sediment removal process followed

Did the water run clean after flushing?

Ensure to keep clear of relief valve/drain valve discharge outlet.

Turn off the electrical disconnect switch.

Attach hose to outlet opening of drain valve and direct end to drain.

Open the drain valve by turning the hand wheel to the left (counterclockwise).

If water does not flow from opened drain valve, describe the steps taken for sediment removal.

Ensure no one is in front of or around the outlet of the temperature-pressure relief valve discharge line.

Ensure the water manually discharged will not cause any bodily injury or property damage.

Operate the pressure relief device to ensure proper operation.

Verify that the pressure relief device is not blocked.

Remove lime deposits from the pressure relief device.

Did the valve completely reset after operation?

Turn off electrical disconnect switch

Drain the heater following DRAINING instructions

Remove the elements and gaskets from the openings

Place limed ends of heating elements into UN-LIME delimer and allow scale to dissolve