Economy Model Auto-Change Over LPG Regulator

Use two propane tanks hooked up together and this valve automatically switches from one tank to the other when the first tank runs empty. The Green flag in the window changes to Red and identifies empty tank. The regulator is pressure adjustable.210,000 BTU. Inlets = 1/4″ Female inverted thread, Outlet = 3/8 ” Female pipe thread. Uses two 24 inch pigtails for hook up to tanks. Order separately. UL Listed.