re: Propane tank not flowing 100%

The following is a description of the function of the check valve in the tank:

The check valve is installed to detect hazardous leaks in your propane tank. When the tank hand wheel is turned to open, the liquid propane travels through the check valve and the barbeque grill regulator to fill the hose attaching to the grill manifold. Providing the barbecue grill valves are in the “off” position the propane stops before filling the gas grill burners and the pressure checks back to the valve. If there is a leak in any of the fittings that connect your propane tank to your gas grill, the drop in pressure is noted and the tank goes “into check” which restricts or stops gas flow.