noisy plunbing

[optomist]

Over the past year I have had a new boiler installed (courtesy EU scheme) followed by other jobs ,ie fix shower unblock drains, its been one thing after another.
Now I am left with rumbling pipes nearly every time I turn on a hot water tap, I have to go upstairs to turn on another tap to stop it. This happens whether or not the boiler or h. water on on., they are on separate systems now. The noise is loudest from the shower pump which has just been moved out of the loft. I think there is no vibration in the pipes as 'holding ' them makes no difference. All I can think of is perhaps the pipes need draining, if so would appreciate instructions, any help gratefully received.

[Malagabob333]

Noisy banging pipes or water hammer is mostly the fault of unclipped/bracketed pipes.

[Whoever]

I assume you have bled all your radiators and that the rumbling is not caused by air in your central heating system? Can you not ask the original boiler installers to come back and investigate, saying you're not happy that the system is operating properly.?

[optomist]

Thanks you two for advice. Will now try out all your suggestions. Must say, the last couple of days it seems to be settling down, the noise isn't so loud or frequent.