Fuel Tank Vent Filter
From time to time I get people coming to me with problems with pump voltage climing, eventually leading to pump related errors. A lot of the time it is because of a dirty fuel filter. The owner is generally confused as to why his fuel is so dirty and insists his fuel handling is good, it usually results in the poor old fuel vendor being blamed for supplying dirty fuel.
Chances are the fuel is not dirty as supplied but being poluted from your aircraft fuel tank.
As your powering down the runway, dust, dirt and even fine mulched grass is being sucked into your tank via the overboard vent. Obviously it is not doing this at a great or even easily noticeable rate but over time it surely is.
So for the sake of a couple of dollars it is pretty good insurance to fit a vent line filter, just make sure it has sufficient surface area as not to impede air entering the tank. The Sullivan dual mesh fuse looking filter is perfect for this application. Best part is that it is fit and forget as every time you fill your tank you flush anything trapped in this filter overboard to wherever you send your overflow. You will be supprised at how clean your downstream filters will remain.