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Hi Thanks for the reply. I am going to try re-pressurising the existing vessel tonight... hopefully, that will fully implicate it. I have no idea why the vessel should fail in the first place. The entire system is about 6 years old. We had some issues when it was first installed with a...

Hi All This is a new post regarding a problem I have asked about before. We have a Powermax 155x Boiler supplying our heating and hot water at home and it has been suffering from pressure loss problems for a week or so now. What happens is that I re-fill the system to 1bar and then when the...

Hi Can you point me in the right direction for the expansion valve so I can have a look at that before ordering a new expansion vessel. A few years (?) ago we had a leak in the pipe feeding the expansion vessel which was attributed to a valve in the line. When a Potterton engineer came...

Thanks for the help. However, you've lost me now. Where will I find the expansion valve and what/where is the red easing knob? There is a small red knob on the top of the zilmet expansion vessel.... is that what you mean? Any help would be gratefully appreciated.

Hi Again Right, this is what has happened so far. I put a container under the discharge pipe outside and refilled the system to 1bar. I then switched on the heating and hot water and waited. The pressure gradually rose to about 2.5 bar before the burner went off and the pressure slowly...

Okay... I've found the discharge pipe outside I think and put a container under it. I've now re-pressurised the system to 1bar on the pressure gauge and switched on the central heating and water. As we speak the pressure is slowly rising (it's at about 1 3/4 at the minute)... I have had a...

Sorry Mate This is all clear as mud to me... I've opened the front of my boiler and there are various taps inside. I wouldn't know if one of these is the 'second tap' you mention. Maybe someone else will answer both our questions and shed some light. I can now see the small DHW expansion...

Hi All I have a Range Powermaz 155x installed at home and I am having some problems with the central heating. Recently I have found that the pressure is dropping (indicated on the front panel) when the heating is off (the burner is off). I am regularly refilling the system to take it up to...