Originally Posted by High Wire
Yes, they clog with dirty fluids like engine oil, seawater, holding tank contents, etc.
Cleaned it with carb cleaner. The pulsation dampened screw hole was clogged as well. Alas, no cigar...after reinstallation it did improve a bit(reading 15 psi when it was really over 30 according to VDO gauges at helms) for a few minutes but then went back to 5 psi and stayed there.