Overflow Tank In Attic Leaking

To turn the water feed off on a toilet cistern use the isolation valve.
Overflow tank in attic leaking. There are normally two but can be virtually any number depending on the size and type of system you have. If the leaking overflow pipe is at loft level or protrudes from the eaves of the roof then the source is either the cold water storage cistern or the smaller feed and expansion cistern that supplies the boiler if you have one. Flush the toilet to drain the water. This is a valve located on the water pipe that.
The water level in a tank is too high so it is running out the overflow. Use a flat head screwdriver to turn the screw a quarter turn clockwise. The most common leaks coming through the ceiling from the attic would be the float operating valve followed by a burst pipe due to the cold or a joint on the pipe work that may of been knocked at some point. Water leaks occur through roof failure ice dams and water condensation or frost build up inside an attic.
In all cases if you do not know which is the problem cistern then a visual inspection will tell you. Stop the water feed into either of the water tanks by turning the. A leaking overflow on the tank is a common cause of a faulty ball cock which is also known as a float operating valve part 1 or part 2. Rainy weather causes the first type of leak to be discovered.
Once done refill the tank with cold water. Go into the loft and take the lid off each tank. A cheaper way to fixing a float operating valve is by replacing the valve but in some cases as experienced the valve is then weaker and no longer under manufactures guarantee. In every attic there should be an isolation valve to the tank so there should be no reason to turn the mains water supply of until the emergency plumber arrives to fix the plumbing.
Your central heating system might also benefit from a powerflush to clear out any sludge debris or rust that s blocking the water from flowing properly. These type of water leaks are easy to find but also easy to fix if your good at a bit of diy plumbing.