Does the arrow on a residual pressure valve point towards the wheel or master cylinder? No instructions came with it.

When the foot is off the brake pedal, is the 10 lb pressure being maintained in the valve-wheel cylinder line or the valve-MC line?

Thanks!


1948 3/4-Ton 5-Window Flatbed Chevrolet

34 Years. Now with a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.