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Thanks, I will call the engineer and ask if he checked the expansion vessel or not. If he did and it was OK, any other ideas? What about leak sealers like Fernox, would this work if it was a leak dropping 1 bar in 24hrs? Thanks

Thanks for the reply. The engineer yesterday checked the prv pipe and said it was dry, but I did check myself this evening and it was wet, though not dripping. I have placed a jar underneath it to see if there is a flow of water from the pipe at some point. Don't know if it helps, but the...

Thanks for the reply. The boiler is a Baxi Duo-Tec Combi 28 HE and nearly 4 years old. The pipework has microbore pipes going to the radiators from a central larger pipe, though above the floorboards connecting to the radiators they are 15mm pipes - don't ask me why it was like that when we...

I am looking for a bit of help and guidance on a problem with my central heating system. The pressure is dropping by about 1bar over a 24hr period. Also the pressure has started going into the 'RED' around 3bar when hot after the system has been pressurised to 1.5bar when cold. It only started...