Q. What is to be done in the meantime?
A. The boiler must be run by the use of the gauge cocks alone.
Q. What is to be done if the gauge cocks leak?
A. If the leak is in the seat, that part should be taken out and re-ground and refitted. This should be done at once.
Q. What harm is done by a leaky gauge cock?
A. It allows the water to run down over the face of the boiler, which tends to corrode it.
Q. When the leak is where the gauge cock is screwed into the boiler, what is to be done?
A. As soon as the boiler is cooled down examine and see if the gauge cock can be screwed up another turn. If so try that, then if the leak is not stopped the gauge cock must be taken out and a new one put in its place, or the thread of the old one so repaired that there will be no leak.
Q. Why not screw up the leaky gauge cock when the boiler is under pressure?