Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to prime a water pump [title] Turn off electrical power to the pump. [step] No device should be left on if you're fiddling with it. Turn off any and all electrical power to the pump and system at the breaker panel.

Ending1: You can also go to the base of the pump to make sure it's turned off. [title] Locate a plumbing fixture that provides access to the pump system. Ending2: It's also important to unplug the pump before you safely turn it on again. If you're fiddling with the water pump and system, turn on the unit's power switch if there's one; otherwise, switch it off altogether. Ending3: [substeps] In some systems, you might be responsible for turning off the power to the pump. Non-electric outlets in locations with electricity do not need to be turned off. Ending4: Do not allow it to be exposed to any current flowing through. [title] Cover the terminals around the washer and bucket.

Answer format: ending1/ending2/ending3/ending4