TRIDENT MARINE #1230-1411, 2 STAGE LPG AUTO CHANGE OVER REGULATOR For use with 2 cylinders. Connects to each cylinder valve with a (7) Marine Pigtail Hose of (8)Pigtail Hose and (3) Leak Test Adaptor from each side of regulator (1/4 female inverted flare fitting). Regulates tank pressure more efficiently in two stages, and when both cylinder valves are open it automatically switches to full cylinder when the other cylinder is empty and shows an orange colour in the indicator dome. 100% leak tested with and die cast zinc body and 3/8 FPT outlet. 210,000 BTU capacity - service cylinder, 130,000 BTU cap. reserve cylinder. UL listed.