Looking at this question :
Point C head loss is 0 according to the author Bottom right Can’t understand why , any good explanation for this claim ?
Looking at this question :
Point C head loss is 0 according to the author Bottom right Can’t understand why , any good explanation for this claim ?
The symbol $H_{\mathsf{C}}$ here doesn't represent a head loss, it represents an "absolute" head at point $\mathsf{C}$. Assuming that the fluid velocity in the region vertically above $\mathsf{C}$ is negligible, so that the pressure variation in that region is hydrostatic, that absolute head is equal to the vertical co-ordinate of the free surface above $\mathsf{C}$. The origin of co-ordinates is defined to be on that free surface, so the absolute head at $\mathsf{C}$ is zero.