Combi Boiler Pressure Increasing

cwcw

espresso wrote: »

Your post has confused me! Do you not have a tap at each end of the filling loop? Which one is not leaking? The filling loop is just that and should really be removed, although they are often left in place, in your case it is masking a fault.

I don't think so, I can only see one tap, and it doesn't leak. It fills the boiler up when required but doesn't drip when turned off. From the mains supply to the filling loop, there is no leak. But when the filling loop is disconnected (from just the mains supply tap end - it's too tight at the other end), it highlights that there is a dribbling leak coming from the boiler end, and the water coming out is definitely from the central heating system.

cwcw

We've arranged for a plumber to come round next week and take a look, but any other ideas so I can get an idea of how much he's going to charge? :money:

espresso

It's supposed to be a sealed system with an expansion vessel to allow for the increased volume of water as it is heated. It should not therefore leak from the boiler end of your filling loop.

cwcw

espresso wrote: »

It's supposed to be a sealed system with an expansion vessel to allow for the increased volume of water as it is heated. It should not therefore leak from the boiler end of your filling loop.

I know! That's why we've arranged for a professional to have a look. Sounds like it could be expensive...