I've a 5 year old gas heating system which I have to pressurise every few months and which I'm assuming has a very small leak somewhere.
I've searched but can't find it. Someone told me I could add some sort of sealant which may cure it. Can I ask for advice please.
I've searched but can't find it. Someone told me I could add some sort of sealant which may cure it. Can I ask for advice please.