Fairly new heating system but all valves keep leaking? All aspects of plumbing questions and answers, help, tips and information

[Ooni]

I had new heating installed just under a year ago all been fine and then every radiator (6) started leaking, plumber came and tightened them fine for a few weeks then all leaking again. Leaking when heating off only, heating is only used every other week( work away) plumber has said replace every valve but why would they ALL suddenly leak at the same time.
Thanks

[stoneyboy]

Hi ooni
Sadly a lot of products these days are of poor quality or include sub standard components, you will probably have to replace the valves.
Regards S