Whoosh.
And that’s how Leo saved the day, and why Old Man Higgins never called a plumber for a simple airlock again. how to unblock an airlock in water system
“Now,” he said, “turn on the HOT tap first. Then, slowly, turn on the COLD tap.” Whoosh
Leo ran upstairs and closed the bathroom tap. Then he went back to the kitchen, reconnected the pipe, and turned on the kitchen tap. Then, slowly, turn on the COLD tap
“Well, how do we get the cork out?” grumbled Higgins.
He disconnected the flexible metal pipe under the kitchen tap. Then, using the connectors, he attached one end of the garden hose to the cold water valve and the other end to the hot water valve. He turned on the hot tap upstairs (so the air had somewhere to run away to).