Please can you tell me how far into the wall cavity the fittings on the back of the taps and hand shower project as they may not fit? Thanks

The depth behind the wall of each part is as below and it still requires additional space for the valves to be connected to the plumbing pipes. Please kindly ask your plumber for advice about this issue. spout valve: 2.4\" (62mm) handle valve: 2\" (50mm) diverter handle valve: 3.3\" (85mm) hand shower holder: 1.4\" (35mm)