What letter would you see on a french hot tap?
Usually there are no letters on French taps; some old taps bear
the letters C (for chaud = hot) and F (froid = cold). Hot water
taps are always located on the left side, cold water taps on the
right. It is also standard to find color marks (blue for cold, red
for hot) on the taps.
On newer models, having a central lever instead of two taps, you
turn the lever to the left for hot water and to the right for more
cold water. Also the blue and red marks may be found on these type
of taps.