Check to make sure the vent tube isn't kinked. Usually, there is a separate vent pipe that comes up from the top of the tank to allow the tank to vent air as you fill. If the rubber tube part is kinked or blocked it can cause the problem you describe.
it is a contour line of elevation Control index contour, or just index contour
Index Contour
Every point on a given contour line is at the same elevation. Neighboring contour lines are at different elevations.
No. Every point on a contour line has the same elevation.
An Index Contour
A indes contour
It makes it easier to count the number of contour lines.
every dollar = 100 cents every dime = 10 cents 100 dimes = 10 cents x 100 = 1000 cents 1000 cents / 100 cents = 10 groups of 100 cents every group of 100 cents = 1 dollar. So $10
do you drink coffee in the morning this could be the cause
An index contour line is shown after every five contour lines. Index lines show the current elevation every time it is shown. Index lines are usually bolded and have the elevation as a numerical number.
No.
Five