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Hi again. Update and further advice request! The engineer visted yesterday and removed the TRV from the rad in the hall which is where the wall stat is located. He also installed a Honeywell auto bypass valve. So far so good. My questions are these: Now the TRV has been removed from...

anyone know a good plumber??

He said he did although I have not yet received the cert from gas safe

thanks and thanks! some good advice to be had here! The engineer did mention as he was leaving that perhaps we should take the TRV off the rad in the hallway next to the wall stat....strange that he did not do this when he installed the boiler 3 weeks ago. I think it's time to get a new...

thanks for everyone's help, I will speak to the heating engineer about the points raised on here and see what he says. Question though, where would the auto bypass be fitted? and is it an expensive job?

Hi, we changed the entire thing body and valve. The boiler is a Potterton Performa 30 HE and I have checked the TRV's and they have 2 arrows on them so I assume that means they are bi-directional.

5 out of the seven match, we switched the TRV on the worst offending rad (the closest to the boiler) and it made no difference.

To stop the pipes rattling I have to adjust the TRV to max, so no, it doesn't rattle when they are fully open. The vibrating kicks in as the TRV's are closing off.

hmmm, very confused... he said that the pump was not as powerful on my old boiler (15.50) My old boiler was about 15 years old. It's frustrating as he doesn't really have an explanation for it other than the pump being too powerful. Very irritating seeing as I just had the boiler installed...

Hi, I had an old Potterton Puma combi in place before hand. The engineer said that I have bi directional TRV's

Hi, it's a potterton combi boiler (will have to check the model later) its 28kw and we have 7 rads in total all of which have TRV's

Hi, I have recently had a new boiler put in and since it has been installed the rads rattle and bang. The installer has changed a TRV to see if that was the problem but it made no difference. He seems to think that the boiler pump is too strong for the system - it's a 15/60 and my old...