What would be ${\mathrm{\psi }}_{\mathrm{p}}$ (Pressure potential) of a fully flaccid cell?

When water flows into the cell and out of the cell and are in equilibrium, the cells are said to be flaccid. 

Pressure can build up in a plant system when water enters a plant cell due to diffusion causing a pressure built up against the cell wall, it makes the cell turgid. 

In flaccid cell, water does not stay back to build pressure potential ${\mathrm{\psi }}_{\mathrm{p}}$.