Save the loading block the one that has a water separator &bleed vale. It take's awhile but make;s a regulator to fill your Tank's.Use the gauge thats on it.
It seem like standard pipe third? ill see what i can do?thanks"That 90 degree elbow is not safe for high pressures your putting to it. It may last some time but it can fail any time. Please go with a correct pressure rated fitting.