You may have an expansion tank to handle this or you just have an open vent that runs up and fills into the cold water tank in the attic.
Water tank in attic constantly filling.
As this water leaves the cylinder cold water flows into the bottom of it from the cold tank.
To replace the ballcock valve you must first turn off your mains supply to your attic tank.
I recently replaced the ball valve on my cold water tank in the loft but ever since then my wife has complained about the loud whooshing noise as the cistern fills.
However some homeowners choose to wait for their heater to fail.
The other things could be that the heating itself is expanding too much and overflowing.
Reducing the flow into the house from the main stop cock outside might help.
We always had some noise with the old valve but i must agree this is much louder.
The valve is a type 2 high pressure.
The evaporator will then not operate properly and the humidity level will be higher in your home and in the air handler.
So you will still have a small tank in the attic to feed the heating system and to allow for expansion.
You can adjust the pressure with a pressure reducing valve.
As the water level rises the ball rises to switch the water feed off again when the tank is full.
There may be a valve outside the tank near the ballcock valve but otherwise you will have to locate the stopcock it is often under the sink in the kitchen and use this to turn off the water supply to the entire house.
It wouldn t be pressurised then.
The ballvalve in it should be replaced if it s dripping.
One is that the evaporator is filled with debris like hair dirt or dust.
Does it always drip or only when the heating is on.
It is doing what it is supposed to do.
Bought a new valve and ballcock and installed problem was still continuing.
This movement turns the cold water feed on so the tank refills.
Other things to consider include a constantly flowing toilet.
When the water in the tank is used its level goes down and so does the ball and arm.
There are several reasons why the condensate line will clog and then the drip pan will fill with water.
When this is the situation your best move is to purchase a new water heater.
Notice the overflow pipe from the attic leaking climbed up and checked the cold water tank and noticed that the ballcock was no longer working and the tank was constantly filling.
