White-Rodgers Universal Water Heater Gas Valve- Up to 75,000 btu 37C73U-168

Gas water heater ctl, for nat gas only, 1/2" n.p.t. inlet, 1/2" inv flare outlet, 70°f-160°f range, fully reg main and pilot reg fixed at 3.5" w.c., single cycle e.c.o. set at 195°f.