Hi we have had a problem developing for quite some time now - if we flush our upstairs loo we get a fog horn sound made worse when running the cold water. The pipes then seem to knock and I can feel them going to the sink and bath - we've tried to contact a plumber but they are as rare as hen's teeth in my neck of the woods!
Any help would be gratefully received......
I had thought maybe we should drain the cold water tank as I suspected an air lock so would this help or hinder.....calling all DIY gurus!!!