Once water is flowing steadily from every tap with no sputtering, start closing them one by one, beginning with the lowest tap in the house and finishing at the top. The Showerhead Method
If the airlock is in a bathroom or an area where you cannot easily connect a hose, you can try to use gravity to help. how to get rid of airlock in water pipes
This is the most effective method for airlocks in hot water systems, specifically when one tap isn't working. It uses the higher pressure of the cold water system to "push" the air out of the hot water line. Once water is flowing steadily from every tap
This is one of the most effective ways to clear a stubborn airlock by using mains pressure to push the air back into the tank. It uses the higher pressure of the cold
Here is a useful guide on how to diagnose and clear an airlock.