Most people never think of replacing a stopcock. The thought usually only occurs when either it’s leaking or there is an emergency and it doesn’t work. The stopcock is the most important valve fitted in a property, failure of this valve can be catastrophic in an emergency. The only way to shut off the main water supply if the stopcock becomes faulty would be at the service valve situated outside the property, however locating this valve is not always a straightforward task. Become f...