If everything works as intended it should work. OMC went to tanks that let air in, but no fumes out when they put the vent in the single line fitting on top of the tank. Can’t tell if this is one of those? It is the no vent cap! It would have been nice to use an upper housing (dual line) that had both ears broken off to add more symmetry, but I guess that is in the eye of the beholder. Not sure the newer tanks were built as think as the pressure tanks?
Dan in TN