Forum Discussion
Dutch_12078
Sep 08, 2017Explorer II
jplante4 wrote:
Remember that they only fill the tank to about 80% to allow for expansion.
If they fill it properly, they'll fill it until liquid instead of gas flows out of the fixed liquid level gauge, sometimes erroneously called a "vent". And yes, that occurs at the 80% liquid level. The OPD (Overfill Prevention Device) valve may shut off the fill slightly before or at about the same time that the gauge spits liquid.
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