Whenever any water is used in the house (ie taps, washing machine, toilet flush) the toilet cistern (dual flush type) makes a whining noise which can only be stopped by repeatedly turning a tap on and off or depressing the ball valve mechanism to allow more water in to the cistern. Any ideas of a cause and/or a solution?

Thanks

Matt, April 2008

Just a thought it could be slight vibration causing the float to vibrate commonly known as 'knocking' some call it 'Bounce' in my ancient plumbing school.
Try this dodge I've used on main loft tanks floats stick a polystyrene tile or similar under the ball as large a piece possible without fouling the cistern walls and see if that stops it. Can't think of anything else except the valve may be low pressure [Tank fed] and it should have high pressure valve [Mains fed]

Nobby, April 2008