Machinbird: Only problem with this concept is that what happens to the water droplets that inertially fly through the outflowing air at the pitot inlet and accumulate.
The pump control will increase the inside P to maintain the target air flow, therefore water will eventually be pushed out. If this is a transient situation the apparent IAS spike could be filtered by software.
If it would last longer then the pump control would reach its max value w/o generating the target air flow, and the logic would send a "pitot clogged" signal instead of delivering an erroneous speed value. Hopefully one or two of the other tubes would still work.