Compact two-stage automatic changeover regulator are perfect for lower BTU applications such as mobile or seasonal homes. With features like adjustable outlet range from 9.5-13"WC, stainless steel internal components and large aluminum precision machined orifices to provide superior downstream regulation and maximum resistance against weather or contaminated gas.. Also features 3/8" FNPT drip lip vent on the compact size, (1) 1/8" FNPT #54 pressure port and internal spring loaded relief.