I have just installed another radiator to my worcester 24cdi central heating system to which when I opened the isolation valve to let water in the pressure in the water system dropped, I then put the key in the boiler and turned the water pressure up to 1.5bar, after removing the key the pressure has droped to 0 in about a hour, I have noticed that the 15ml copper overflow pipe outside by the boiler has got water coming from it.Could anyone tell me if they know what the problem could be and what I could do please.
Thanks.
Thanks.