Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to clean a beer tap [title] Disconnect your tap lines. [step] Start by turning off the carbon dioxide at the regulator. Then, remove the coupler where it meets the keg.

Ending1: Get to work loosening the shell and check to make sure the shutoff valve leads out correctly. [title] Make a hole in the bottom of the tap canal. Ending2: Finally, unscrew the beer hose. [title] Use a recirculating line cleaning pump. Ending3: This separates the fresh water and allows them to cool down easier. Slowly pour the water down the spout into the keg. Ending4: Take a lift off the bottom body (where the main body of the tap will be) and unwind the end of the coupler. Walk away from the tap line and up the stainless steel bar at the bottom of the keg, to dispense the tap water and store the tap water for later use.

Answer format: ending1/ending2/ending3/ending4