BALL FLOAT VALVES / ROOF TANKS

1)    This is a classic.   The ball valve overflows in the roof tank and the overflow connection is not made up water-tight.

• Every so often the water overflows and trickles down the side of the tank.

• Please don’t moan at the installer. It has probably been knocked over the years and has become dislodged.

• Overflow pipes are very often an odd size if you need to replace bits of them.

2)    Have a look in the little tank when the heating is on. Is it hot?  There may be a restriction in the pipework which is causing the pump to pump water into the “header” tank.

3)    Have a look at any air vents that may be in the roof. If you have pipework that has to come “up and over” and drop down one of these vents may be leaking.