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My heating system's pressure is low, how do I re-pressurise the system?

If the system pressure falls below the minimum (e.g., removal of radiator for decorating purposes) the system should be topped up using the filling loop valve. After the system has been topped up the pressure gauge should read 1 bar when the system is cold. The valve must be fully closed and the filling loop flexible removed from the valve. You should expect a small water loss from the pipe.

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