Is your plumbing recessed too deep into the wall?
If you are unable to screw the flanges onto the thread of your new classic tapware then there is a good chance that it is because your plumbing is deeply recessed. Sometimes this can occur in older buildings where new adhesive has been applied on top of old rendering work, resulting in a thicker wall material being present between your tile surface and the tap seat in your walls. Our Classic styled tapware is supplied with black PVC thread extenders which often overcome this problem. When they don’t then this in wall tap seat and spindle extender kit will bring the tap seat 15mm out.