bolt on what?

usually counterclockwise is open on spigots and clockwise to shut off,i dont see how that will increase pressure, it will increase flow but not pressure

but what bolt? you got a pressure regulator in your house?(unusual)

you have equiptment and you know how to measure water pressure in your home and at the hydrant but dont know what way to turn a bolt to open???

what gives

why dont you hook your guages up and experement, turn your bolt one way and take a reading, turn the other way, take another reading….before long your have figured it out

then post back and let us know what the hell your doing hooking guages up to hydrants???