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More detailed question about a plumbing problem I have posted before but I wasn't specific enough so the answers didn't help. I have ground floor apartment. We had the shower room totally re-furbished. Tiles were ripped off the walls and a new bathroom suite was fitted. The plumber fitted a new shower cubicle using existing pipes. The tap pipes come out of the wall just above waist height horizontally. There is a seperate tap for hot & cold. The shower head is supplied by a pipe which comes out of the wall at about 6.5 feet high. All of the pipe work is built in to the walls,which have now been re-tiled. Hot water feeds from a tank in a utility room 20 feet away via pipes inside walls. The water supply has not been changed, only the taps and showerhead have. When I turn on the hot water on the tap phyiscally vibrates and there is a loud banging noise. My plumber has disappeared, how can I fix it without ripping my bathroom to bits?

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