Recently had been to fill up the tank for my car and these people pulled down the filling jack from Air and said “Sir Check the Zero” I said I want petrol and not Diesel looking at the Meter close by.
Then they showed me one more meter right at the left top of the above image
I was shocked. I felt like an idiot.
The next time some one is pulling those pipes, do care ask where you have to look for, before assuming things.
One more thing you can note at the top image the bend in the pipe could hold atleast 50- 100 ml of petrol. So be careful.