Quite often if we have people staying and we all use the shower, of which we have two (even the electric shower), or if I run a bath for my children, the water upstairs seems to 'run out'. The taps downstairs are working fully, hot and cold, it's just upstairs. Also, when we have been on holiday for a couple of weeks, when we go to use the shower for the first time, hardly a drip of water comes out.
Very weird. Does anyone know what's happening and if it's something simple? Hopefully it won't be something expensive..........