neighbour's noisy heating

[shimmy]

Hi there hope someone can shed some light on a noise problem from my upstairs neighbours heating.she has a potterton puma 8yrs old, trv's on radiators.the pump broke down was replaced,now when her heating is on a loud noise like a tap running occurs through out her system,gets louder the longer its on also makes a howling noise sometimes as well,goes away for 10 to 20 seconds when she turns her hot water on then starts up again sometimes louder.She has had the pump changed to no avail.the noise is continual,droning like the main tap is on full,has never been like this before,only after the pump broke down any help would be much appreciated.Two different plumbers have been stumped.

 

[ChrisR]

Pipes vibrating against floor joists??

 

[shimmy]

Pipes vibrating against floor joists??

Hi Chris cheers for replying,no its not vibrating pipes they have been laged and secured,it sounds like a cold main tap running on full and u can hear it all through the flow and return pipes,when she turns her hot water on for a couple of mins it goes away for about 20 seconds or so then starts back up getting louder then it starts to howl then back to the rushing water sound. ps.it cant b heard upstairs in her house!but really annoying

 

[shimmy]

Pipes vibrating against floor joists??

Hi Chris cheers for replying,no its not vibrating pipes they have been lagged and secured,it sounds like a cold main tap running on full and u can hear it all through the flow and return pipes,when she turns her hot water on for a couple of mins it goes away for about 20 seconds or so then starts back up getting louder then it starts to howl then back to the rushing water sound. ps.it cant b heard upstairs in her house!but really annoying

diferent heating engineers came today they took all my neighbours myson trv's and the noise subsided,going to come back on friday march 7 to fit danfoss trv's to see if it helps would appreciate any comments on this thanks!

 

[blondini]

Maybe the flow direction was inadverently reversed when the pump was replaced?