Use to be very common around here to have a different hose for each grade. You would pay, then pick of the hose for the grade you wanted, then flip up the latch that the hose rested in to activate it.
last 15 years most placed have switched to a single hose for all grades, and you press a button to select the grade.
last 15 years most placed have switched to a single hose for all grades, and you press a button to select the grade.