Recent content by True Blue

I'd just like to thank kevplumb and BDL for their replies. Especially BDL who I think may have solved my problem. I'm sitting with the TRV I removed off the new top rad, turned the pump back up and so far the huge creaking and banging have not returned. I'll let you know if things change

I have a 3yr old potterton profile(40eL) gas boiler feeding 7 rads. Recently had the top rad moved in my bathroom. When plumber left system was quieter than it had ever been. Recently however,after the boiler has been running circa 1-2hrs there then follows a series of quick taps in the ceiling...