1/2" direct ignition dual automatic combination valve, 24vac, single stage, standard opening, 3.5"wc regulator setting, 20-200 cfh capacity, 1/2# pressure rating, 1/8" pressure tapping with plug, for use with hot surface and direct spark systems, includes one 3/4" straight flange, one 1/2"x3/8" reducer bushing, lp conversion kit