Humming from Trv?

[mutley racers]

I have just been sent this video from a mate of his cast iron radiator. I have heard pipes banging from trv's being on the wrong way, but does this humming mean the same thing? [video=youtube;jj1EjaD52hE]http://www.youtube.com/watch?v=jj1EjaD52hE&feature=youtu.be[/video]

 

[kozak1968]

Yes It can indicate valve being fitted on the return. Some of the designer type valves are not bi directional. You need to find instructions for more info.

 

[mutley racers]

find instructions for the valve, that is not going to be fun!!!!

 

[AMGasServices]

Thanks kozak1968 I've just learnt something new today.

 

[kozak1968]

Try online, theres bound to be a manual somewhere. Do you know the make of valve?

 

[mutley racers]

that is the problem, I don't know the make of the valve. Apparently they have been fine from october, it is just now it has started happening. It is in a block of flats that run of a couple of boilers in the basement. And I too did not realsie that some valves aren't bi

 

[kozak1968]

Maybe worth trying to re-balance system. The rad with the problem could be taking a higher flow rate than the others. By opening the other rads more, will slow the flow rate (velocity) and noise.

 

[mutley racers]

i shall give it a go. thanks chaps. First port of call is valve MI's to see if they're Bi