Car alarm/remote question?
Yellow lines separate traffic in opposite directions on ONE LANE roads only .. example being there is only one lane headed east, one lane headed west. So say you're on this road and the speed limit is 55 but you're stuck behind someone that is doing 40, you of course want to pass, so you wait until the broken yellow line is on your side of traffic and proceed to pass as long as there is not oncoming traffic. You only want to pass if the opposite lane is clear and you can clearly see that there are no approaching vehicles.
Spend the money and buy a new manifold,also do some research as to setpoints and pressure high low limits for your unit. Schrader valves used to be the norm for most systems. But with the influx of harry homeowners doing weekend honey do fix-it-all jobs the industry has tried to limit what harry can do, to protect the market so to speak. Plus with the new release to atmosphere restrictions on Freon, the industry is trying to police and control who has access to Freon based products.