Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to turn on a water heater [title] Shut off the water supply and gas valve or circuit breaker. [step] Turn the gas valve to " off, " or make sure the breaker switch for the water heater is off at the circuit breaker. To turn the water supply off, twist the valve for the cold water supply line that enters the tank (usually from above).

Ending1: [title] Unscrew the gasket between the faucet and the wall. [step] It should have either been removed previously, or it should be lying in a hidden place. Ending2: Pull off the tank cover to reveal its tight-fitting drain pipe. [title] Open the tank cover and pull off the hose to make sure it is not draining. Ending3: [substeps] The breaker switch for your water heater should be labeled, but if it isn't, go ahead and turn off the main power. [title] Drain and flush the tank to clean it out. Ending4: [title] Remove the lid from the tank to see if it appears lower than the original diameter of the tank. [step] Trying to remove the lid that hides the water faucet that leads to the supply valve is not always the best move.

Answer format: ending1/ending2/ending3/ending4