Quote: (Originally Posted by
decoweenie)

Mike,
I had a sorb grain stuck under my OPV of the Classic KISS during a dive trip in Italy. The solution was to cut a piece of white hydrophonic foam used in the MK-15, and secure it at the base of the OPV. Gas passes, solid stays...
Never had the same problem again after that...
A hydrophobic membrane over the opv would prevent you clearing water from the CL so flood recovery would be impossible.
Better off using stainless mesh