Style 1651 Leak Control Breather

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.