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This breather was designed especially for a vehicle
gasoline tank to prevent a pressure build-up and to minimize leakage if the
tank or vehicle turns over.
The unit allows free flow of air to vent the tank
when in normal position. When the tank is turned more than 90 deg from normal
position, the ball acts as a baffle which restricts the amount of leakage,
reduces fire hazard and eliminates pressure build-up which could rupture the
tank. |