Block the spout firmly with your palm or a cloth to create a seal. Slowly turn on the .
The tap "coughs" or sprays water inconsistently.
: If the airlock affects the central heating loop, the top of radiators may stay cold even when the heat is on. Why Airlocks Happen air lock in hot water tank
Small leaks can allow air to be sucked into the system even if water isn't leaking out.
The high-pressure cold water will be forced back up the hot water pipe, pushing the air bubble back into the tank. Block the spout firmly with your palm or
If you don't have a mixer tap, use a short length of hose to connect a cold mains tap to a hot tap. Secure the hose to both the hot and cold taps using clips. Open the first. Slowly open the cold mains tap .
If you have a mixer tap in your kitchen (where the hot and cold spouts meet), you can use the water pressure from the cold line to push the air lock back into the tank. : If the airlock affects the central heating
For vented cylinders with a cold water tank:
Disclaimer: This guide is for informational purposes. If you are unsure about any step or if your system is pressurized, please consult a certified plumber.