Breather vent for vapor vent valve

Abstract From the Canadian patent

Abstract of the Disclosure, A breather vent mountable on the vent pipe outlet from an underground storage tank at a gasoline service station site. A vent housing includes a body section adapted for placement on the vent pipe and which cooperates with a superposed cap section to accommodate a vapor floatable valve disc supported internally thereof. Vapors from the tank can normally discharge in a primary flow path past the valve disc from where it is diverted upwardly by an annular diverging deflector to atmosphere. Displaced apertures having comparatively increased protection against freezeup form an alternative outlet for a secondary flow path diverted downwardly from a location downstream …