Have found the water is passing through and as you said the ch system was empty and this is the first time it has been commisioned .I have added 5 new radiators to the existing but the ch system has never been used. Don't have a clue how much water is required to fill the system or how long this...
Have a Gavina ,oil fired combi- boiler. Hot water is fine. Have just opened the boiler valves for the central heating.The pressure drops from 1.5 to zero and have for 10 minutes used re-fill loop to no avail .Is it that I have an extremely large leak ?Any suggestions please