Sometimes, the airlock isn't in your taps, but in your central heating. If your radiators are cold at the top but hot at the bottom, you have air in the system.
Leo smiled. “We don’t pull it. We push it.” how to unblock an airlock in water system
Turn off the cold tap first, then the hot tap, and carefully remove the hose. Method 3: The "Taps and Toilets" Method Sometimes, the airlock isn't in your taps, but
If you have a header tank in the loft, ensure the ball valve isn't stuck. If the tank empties, it will suck air into the pipes. the airlock isn't in your taps