Thread: Extreme Sensor
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Old 12-25-2006, 07:07 AM   #4
rverdlm
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Join Date: May 2005
Location: On the road
Posts: 1,063
It is the hole just above the fill hole. That is not to prevent over filling. It is so that air can get in and out of the tank. If you have seen water come out of this when you fill, it can have water sitting in a low spot that will prevent air from getting into the tank. Try removing the fill cap and running the pump to test this. Of course if the fill hose has a low spot this may not work ether.
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