Originally Posted by
cycross
There is a genuine market for filters designed to be on the vent side - something big enough for volumetric air to flow well without causing fuek tank cavitation yet traps out the dirt. Think different sizes as well to cater from small to high-flow turbine setups. Keith is correct that despite the best of fuel filtering, the one open source of impurity is from the fuel tank air vent.
I must admit that I have never really thought much about the vent! With the engine running, it must act like a little vacuum cleaner, so maybe some stocking material taped over the end of the pipe or some sort of filter, maybe this?
https://www.ebay.com.au/i/2933668251...hoCFb4QAvD_BwE