It is called a Cyclone. the wind hits the point of it and passes over it and uses Vacuum ti pull the smell out of the tanks. I have had them on all my trailers and never had any smell whatsoever.
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2018 Jayco Jayfeather 27 RL, 2002 Ford excursion, v-10, 3:73 gears 4x4 mine. 2020 Buick Encore Hers, Retired Air Force, now Retired.
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