Combines Gas Control for use in 24 Vac gas fired, standing pilot appliances with capacities from 30-300cfh, with 1/2″ inlet 3/4″ outlet, and has pressure regulator Setting is 3.5″ w.c. This unit comes with one 3/4 x 1/2″ reducer bushing 393691-14 bag assembly-3/4″ straight flange with O ring, screws and wrench; 393200 ECO adapter; Q340 (36″) thermocouple with adapters; 393691 Natural to LP gas conversion kit.