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Yeah, just looked at the pressured one and the closure system is better constructed - like a piston that you turn to close it downwards. They seem to open up more with less turn of the valve.

Hi, Just noticed that I have purchased a pressurised radiator valve instead of a standard one. Whats the difference and when and when not should you use a pressurised one? Thanks, Steve

and pump is a Grundfos Selectric4. Hope this helps. :)

Sorry, an addendum - my boiler is an old thorn olympic (don't know the model number) but it gets serviced every year and the bloke tells me i don't need a new boiler as this one works fine. He recently came and changed the thermocouple as the pilot wasn't lighting. What would happen if I...

Hi,newbie here. My problems have been ongoing for a while now. Not sure when they started, but have recently drained the system to refit a new radiator. Did that and refilled system. Bled all radiators periodically as air was getting trapped at the top of the upstairs rads. I continually get...