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Not found the leak. Checked all radiators and no stains on the ceilings. The Worcester Engineer has checked the boiler and says the boiler is working correctly. I'm thinking the leak must be in the pipework downstairs. My boiler pressure drops 0.5 bar over a 48 hour period. Is it ok to...

I have a leak somewhere in my central heating system. I have tried the B&Q Plumbsure leak sealer, however this didn't work. Want to try a different leak sealer before I lift the carpets / laminent? What make would you recommend?

Thank you for the replies. If the problem is with the EV, where's all the water going? I have placed a plastic bag over the overflo tap on the external wall and it is empty!

sorry i'm a complete novice. CH turned off = 0.5 bar CH turned on = rises to 2 bar CH turned off = 0.2 bar Pressure dropped by 0.3 bar!

I have a Worcester 28CDI boiler. The pressure keeps dropping from 0.5 bar to 0.2 bar after the CH has been on for 3 hours. Whilst the CH is on the pressure rises to 2 bar. The boiler has been serviced by worcester and have been told the fault is definately not with the boiler. I have...