How To Unblock An Airlock In Water System Page
“Now for the magic,” he said, and slowly turned on the cold water mains tap.
“Simple physics,” Leo grinned. “Cold water pressure is usually 3 or 4 bar. Your gravity-fed hot water tank is only 0.5 bar. The cold water just bulldozes the air bubble back where it came from.” how to unblock an airlock in water system
And that’s how Leo saved the day, and why Old Man Higgins never called a plumber for a simple airlock again. “Now for the magic,” he said, and slowly
“Then you use the old plumber’s trick,” Leo said. He turned off both taps. Then he stuffed a wet rag firmly into the kitchen tap spout, sealing it as best he could. Your gravity-fed hot water tank is only 0
Higgins did. The water had nowhere to go because the rag was blocking the spout. It couldn’t flow out, so it did the only thing it could: it flowed backwards down the hot water pipe, pushing the airlock all the way back to the tank.
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).
Whoosh.