noisy water pipes since British gas work

[dave61072]

Please help
A few years ago we had a new combination boiler installed by British gas
This involved moving it to a different place in the house
After the work the installer told me he had tapped into the existing water pipes nearer the new position of the boiler which had in fact reversed the water flow throughout the house
Since that moment the pipes have been noisy not banging or creaking but the whooshing sound you'd imagine water travelling through a pipe would make
We've put up with it but are now selling the house and can't sell it as it is what would you recommend
Please get in touch

 

[Dotty]

You'll either need to try and get BG back, although it'll be beyond the warranty for workmanship (should've complained at the time but I expect you realise that now). Or call in a small independent to sort things out.