karmarepair wrote:In his defense though, there is literally no way for rain water to get into the Sonex fuel tank, and Pete keeps his tank full all the time, so condensation is not a threat either.
But it is not completely unknown for an FBO pump to deliver a small quantity of water.... Despite daily sampling - it HAS been known to happen. And folks flying on car gas with ethanol risk water from the ethanol absorbing it from the atmosphere.
Master Alaska Bush Pilot Bud Hendricks relates how they used to always filter fuel through a genuine chamois skin while fueling in the frozen north. The skin acted as a dirt filter and the chamois skin also absorbed any water - only allowing fuel in the tank. As they were fueling from cans and there might be snow swirling in the air as they did - it was their only protection for the tanks. There was the ONE day he omitted the chamois and that was the day the engine stopped with a plug of frozen water in the fuel line into the carb.