Water breakthrough pressure

The pressure required to force water through the pores of a hydrophobic membrane.

FAQ
The pressure required to force water through the pores of a hydrophobic membrane.
Water entry pressure is the minimum pressure required to force water through the largest opening of a dry hydrophobic membrane. The water entry pressure represents the filter’s ability to serve as an aqueous barrier. This for instance is an important characteristic to consider in hydrophobic venting.
The membrane filter is placed in an inline filter holder and continually increasing water pressure is applied to the hydrophobic membrane until water appears at the outlet side.