Recently (since last week), the pressure in our heating system (as indicated by the pressure gauge on the boiler) is dropping rapidly. We're having to top this up around once every two days. As I understand it, this is caused by a leak somewhere in the system.
Are there any ways to identify where this leak may be. I've been around all the radiators and visible pipes to check, and can't find anything. Is it just a case of waiting until water starts dripping though the ceiling somewhere?