Best way to test for central heating leaks

[garrymum]

Hi

I am unsure if we have a small leak in our central heating system. Basically, we had a bathroom radiator moved from one wall to the opposite wall about 5 months ago.

When I am in the room directly below where the old radiator was I can hear some strange noises, also getting quite a bit of air in the system*.

There is no visual evidence of any water damage, I'm just going by the sounds and the presence of air in two upstairs rads.

System is a conventional system, with a hot water cylinder and a header tank in the loft. What is the best method of determining if we do have a leak?



* Although I have recently flushed out the CH system and re-filled so the presence of air may just be a by-product of this re-filling and not totally expelled yet.

 

[John506]

Is the pressure dropping on the dial on the boiler?

You might have a micro leak, too small to let water out, but not small enough to let air in.

 

[John506]

Or you could tie the arm up on the header tank, and if the water in the tank goes down then you have a leak because it is having to keep topping the system up.