Just pour the fuel through Mr. Funnel and it instantly removes water and debris. There is nothing else like it on the market. Just pour the contaminated fuel into the filter and the water-free fuel flows through. Any water that was in the fuel will stay in the funnel - just dump it out when you've filled your appliance. To clean, just turn it upside down and whack it onto a hard surface. Nothing to replace, ever. Model F3C filters up to 3.5gpm and can be used with the Mr. Funnel Fuel Filter Extension Tube ("A FLO 203-EXT" - sold separately) for hard to reach places.